For the testing of the DC power supply, what would be the cause if the multimeter was going lower than zero? I'm using an analog multimeter with the exact same measurement calibration you set.
Thank you! Very helpful. My question is that if the battery mechanism is only showing 3.30 on the meter then does the battery mechanism need replaced or are we just better off putting in a who new motherboard?
What if there is a leakage of voltage in the battery bouncer? I plugged in the power and tested the voltage. It started at 1.8V, but eventually went to zero. I assure there is a damage in one of the motherboard capacitors?
Hi I own the Acer Aspire E1-571G which its DC power jack was loose and sometimes not charging the battery , once I open the laptop and tried to fix the power jack loose connection wire , however suddenly my Iron solder shortcutted to the power jack body and sparked and my laptop never turn on anymore , I guess polar diode connected to power input socket may harmed I really appreciated to have any advice or repair procedure for this issue
Hallo! How can you tell if the power circuit/charger inside the computer is working or faulty? The laptop powers on, but will not charge the Battery. I'm curious if the battery is faulty or faulty charging board or power management software< The battery is likely more than 2 years old. Thank YOU!
hi, nice video, but I have a question, if is dangerous to connect the jack cable to the motherboard jack how can I checked? is normal to have continuity between the ground pins and the positive pin? I desolder the jack cause my friend says It make smoke and get redhot light from it, Is the motherboard pins shortcircuit if it had continuity between the 4 pins and the 5 postivie pin? (my multimeter read 1 if it fail, and 0 if it had continuity, but thos is giving me 0.004), how can I test? thx in advance
Can you tell me what voltage value has to pass on the blue wire of the Jack Dc of the thinkpad T420? Here's measuring zero volts! The T420 does not turn on or turn on the led. Could it be Jack Dc?
Hello Jason, Thank you for the procedure in checking DC Jack. I have a question though. You told in the video that if you don't get any reading in the battery port, motherboard is dead so I'ts for replacement already. I am fixing a netbook Acer Aspire ZG5 with good battery, I checked power adapter and DC Jack, both has reading 19v but when I tried to turn on the unit, it's not turning on without a battery. When I insert the battery it's turning on but the battery is not charging, discharging only even the power adapter is plug in. The motherboard is good, where could be the problem?
That's a tricky one, could be anything on the motherboard along the way that carries the power to the charger port. Unfortunately motherboard repairs are a little out of my depth, I usually opt to replace it. Let me know if you succeed with this one.
sir i am from india poor a village here no service center i about laptop and desktop little can you guide my to repair a laptop problems is not powering up i have mutimetor and smd work station please ? waiting for replay
I have an old acer 1350 when I insert the 19v power supply into the socket it doesn't turn on anymore. I measured the pin socket on the motherboard and read 3.5v. Bad solder socket or not?
Jason, can you please give any suggestions on how to test a Tyco cable/harness type dc adaptor?. Like the one you talked about in the beginning of your video.
Just like this ruudney drive.google.com/file/d/0B4q_Y31tv9fRODduYk1KZVllTTA/view?pageId=102481811650341555290 In the pic I technically have the red and black back to front, but it makes no difference.
Is it possible that the tester can show correct but that there is still a problem with the jack? In particular can the jack cause a board to heat up if not working correctly?
There's a weird sound in my Dc jack of my laptop upon plugging my charger into it. Does that mean something wrong with my mobo or just the problem with the jack?
nice video , sir when i plug in charger into laptop , charging light blow for 2 second than goes off, and system tray showing "plug in but not charging" i checked my adaptor with multimeter it's fine battery is also fine, is my motherboard is faulty ? or only dc jack is need to be changed.?
I'd switch out the DC jack 1st. Process of elimination and cheaper than a motherboard. Hopefully it's the cable version of the DC jack otherwise you're looking at de-soldering and re-soldering which can be tricky without experience.
I have the voltage coming off my power supply. But no power to the board when plugged in. I have an Acer with a dc jack cable and it has continuity. So why would power not transfer if it has continuity?
Yep, if you get red and black wrong way the reading will show either positive or negative. On the battery module test as long as you get a reading it doesn't matter. What you're trying to see is that power is getting from the DC jack to the battery charger elements. Keep in mind different laptops can be configured differently.
I was just trying to fix this very same motherboard, so I ran those tests and I was a bit surprised when I saw that I had voltage so I went "what the fuck, am I doing something wrong?". Then I found this video and realised that it's just freaking dead... lol thanks anyways! At least I won't waste my time on this anymore.
At around 2:30, when testing the charging cable, does it have to be plugged into a wall outlet? I have the same question for when the cable is in the DC jack?
on my power supply I have a blue light indicator to show it has voltage .when I plug it in to my computer the light goes off straight away and my computer will not power up . any thoughts on this Jason.
+nicoclause Hi nicoclause. If you have a multimeter you can test the power supply. Set it to how I've set mine in the video and simply hold one of the tips on the outside metal part of the tip that plugs into the laptop, and touch the other tip on the inside of the jack. Most power supplies have a small pin in the centre. Try carefully to touch that and noting else. Should read around 19v. If it's not got a pin in the centre, then you should be able to touch the metal wall on the inside. Good luck. My guess is that the power supply is faulty. If the laptop was faulty, the LED would stay on regardless. Clould be wrong though hence why you should test the power pack.
hi Jason thanks for your reply its not the power supply mate . the power supply is ok until I plug it in to my computer, then the blue light on the power supply goes off , and wont charge my computer.
Hello, nicoclause. I have the same problem and I can't understand if the problem is with the power adaptor, power jack or with a motherboard. My power supply has small pin in the centre, I checked it with a multimeter - it was 3.5V but on the inside of the tip it was 19.5V. then I connected separated power jack on to the supply cable and it was reading 19V. When I connect those two to motherboard, the light on the power adapter goes off and no power is coming off. I can't understand what exactly triggers the disappearance of the power. What did you do? How did you solve it? Thanks!
Hey guys. Thanks for opening up this discussion. I am having the same issue with my Dell laptop. Multimeter reads 19.5ish volts on AC Adapter when unplugged. When I plug it into the dc jack on the laptop, the green indication light goes away on power supply and if I sniff near the hole (don't laugh lol) I can smell the residue of hot electronics which is different than the other holes... also, if I sniff on the inside of the laptop that smell does not come up. Only at the DC hole where it connects to power. Did any of you figure out the issue? My guess is that either the power supply or the laptop has a fail safe that shuts it off when it detects a short circuit to prevent longterm damage? I will replace the DC strip in the laptop and see if that resolves. If it doesn't, then I guess it's the mother board.... any thoughts y'all? T
Hi Light. It doesn't really matter. If you get it the wrong way around, your voltage will show a minus. You'll be able to work out which is which by that.
Isn't it a bit too early to simply swap the motherboard, the second the DC jack is fine? The DC jack isn't the only component, which can be replaced. So jumping straight to motherboard replacement seems like an overkill to me.
If the computer is not charging or getting power, it's either the battery or the dc jack, or the charger itself. If none of those fix it, then it's a bad board. Doing a SMC reset can save the day quite often, so that's often the very first thing I try.
+100timezcooler I tried per your picture that you sent for testing with a wire. But I get zero on my old jack so I bought a new one (for an Acer Aspire 4743). BUT I also get zero on the new one. It seems the probability of a new one being bad too is pretty small (though possible). I went to a phone/laptop repair place and they stuck their pins in the end of the the connecting tab (not the top as in in your picture) and got about 1 (or .1) readings on both using some power supply they had so said that they were BOTH were good. I thought I should get a reading of about 19 as (I tested) in the inputting charger (though my charger is not from this computer because it is missing).
Have something similar on a machine I'm looking at now. The motherboard side of the DC jack cable gives me 1V. Power adapter gives me 19V. I'm leaning towards a bad jack, except I just replaced this jack a few months ago (was broken from case damage). And it charged the laptop fully the day before. Today no power to the board - although it does run on battery. Looking for clarification on the 1V thing. I'm fairly confident it should be 19V and that I'm dealing with wonky power jack.
How do you know how many volts the battery port should be putting out. For example my ac adapter is 19 Volt, the dc jack is 19 Volt but the battery port is only showing 9 volt. Is that enough to charge the battery because its not charging.
is it just me, or have you connected your live "red" multimeter into the Com port when it shoud infact be the other way around?! for example when i test power adapters, I put the red one into the hole "live" and the black one on to the side of the plug. that said i am no master at using a multimeter, hence why i am asking. maybe i am doing it wrong
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Excellent video, very clearly explained, thanks.
thanks Jason I was going to throw my Sony laptop away. But after replacing the DC jack it works fine now. THANK U.
very informative and clear!
Liked this, Very nicely explained
Big thanks from malaysia
I like this clearly explained
For the testing of the DC power supply, what would be the cause if the multimeter was going lower than zero? I'm using an analog multimeter with the exact same measurement calibration you set.
Thank you! Very helpful. My question is that if the battery mechanism is only showing 3.30 on the meter then does the battery mechanism need replaced or are we just better off putting in a who new motherboard?
thanks for your valuable information video. what is the model of digital Avometer? thanks
Thank you for your videos, I have a Lenovo yoga and I'm getting continuity between positive and negative on the board. Is this not normal?
What if there is a leakage of voltage in the battery bouncer? I plugged in the power and tested the voltage. It started at 1.8V, but eventually went to zero. I assure there is a damage in one of the motherboard capacitors?
Hi Jason,
My DC power supply measures 17V (OUTPUT = 20V). Does that mean the problem lies from my laptop charger?
Thanks!
Hi
I own the Acer Aspire E1-571G which its DC power jack was loose and sometimes not charging the battery , once I open the laptop and tried to fix the power jack loose connection wire , however suddenly my Iron solder shortcutted to the power jack body and sparked and my laptop never turn on anymore , I guess polar diode connected to power input socket may harmed
I really appreciated to have any advice or repair procedure for this issue
Hallo! How can you tell if the power circuit/charger inside the computer is working or faulty? The laptop powers on, but will not charge the Battery. I'm curious if the battery is faulty or faulty charging board or power management software< The battery is likely more than 2 years old.
Thank YOU!
hi, nice video, but I have a question, if is dangerous to connect the jack cable to the motherboard jack how can I checked? is normal to have continuity between the ground pins and the positive pin? I desolder the jack cause my friend says It make smoke and get redhot light from it, Is the motherboard pins shortcircuit if it had continuity between the 4 pins and the 5 postivie pin? (my multimeter read 1 if it fail, and 0 if it had continuity, but thos is giving me 0.004), how can I test? thx in advance
Can you tell me what voltage value has to pass on the blue wire of the Jack Dc of the thinkpad T420? Here's measuring zero volts! The T420 does not turn on or turn on the led. Could it be Jack Dc?
My adapter is reading 19.65 V and my jack pins (on the mobo) 18.5 V can it be an issue?
Hello Jason, Thank you for the procedure in checking DC Jack. I have a question though. You told in the video that if you don't get any reading in the battery port, motherboard is dead so I'ts for replacement already. I am fixing a netbook Acer Aspire ZG5 with good battery, I checked power adapter and DC Jack, both has reading 19v but when I tried to turn on the unit, it's not turning on without a battery. When I insert the battery it's turning on but the battery is not charging, discharging only even the power adapter is plug in. The motherboard is good, where could be the problem?
That's a tricky one, could be anything on the motherboard along the way that carries the power to the charger port. Unfortunately motherboard repairs are a little out of my depth, I usually opt to replace it. Let me know if you succeed with this one.
Well hope you can help me. I can give u a link I uploaded a pic maybe you can tell me something about it. Here's the link i64.tinypic.com/8yfk2t.png
sir i am from india poor a village here no service center i about laptop and desktop little can you guide my to repair a laptop problems is not powering up i have mutimetor and smd work station please ? waiting for replay
I have an old acer 1350 when I insert the 19v power supply into the socket it doesn't turn on anymore.
I measured the pin socket on the motherboard and read 3.5v. Bad solder socket or not?
Jason, can you please give any suggestions on how to test a Tyco cable/harness type dc adaptor?. Like the one you talked about in the beginning of your video.
Just like this ruudney drive.google.com/file/d/0B4q_Y31tv9fRODduYk1KZVllTTA/view?pageId=102481811650341555290
In the pic I technically have the red and black back to front, but it makes no difference.
Is it possible that the tester can show correct but that there is still a problem with the jack? In particular can the jack cause a board to heat up if not working correctly?
There's a weird sound in my Dc jack of my laptop upon plugging my charger into it. Does that mean something wrong with my mobo or just the problem with the jack?
what sort of multimeter is that
nice video , sir when i plug in charger into laptop , charging light blow for 2 second than goes off, and system tray showing "plug in but not charging" i checked my adaptor with multimeter it's fine battery is also fine, is my motherboard is faulty ?
or only dc jack is need to be changed.?
To be honest, 'not charging' sounds like a battery issue. Is this a Dell by any chance?
Yes it's dell studio 1558.
But my battery working well on another same laptop.
Is it a genuine dell charger?
Yes, charger is also work on another modle, problem is same when different charger is used.
I'd switch out the DC jack 1st. Process of elimination and cheaper than a motherboard. Hopefully it's the cable version of the DC jack otherwise you're looking at de-soldering and re-soldering which can be tricky without experience.
Question: if the motherboard is not faulty i and motherboard suffered liquid spill would still should take power to battery?
I have the voltage coming off my power supply. But no power to the board when plugged in. I have an Acer with a dc jack cable and it has continuity. So why would power not transfer if it has continuity?
If you're getting 19v (ish) through the DC jack then I would guess the motherboard has died.
what s ye foam for?
on the battery plug, are you sure you are not the other way around? black (ground) on the single big metal and red(+) on the others?
+Tayo Rizieg Doesn't really matter, you're looking for a reading and not dead life.
Jason Smart thanks jason, when i put the other way around it read ok otherwise it read (-) :)
Yep, if you get red and black wrong way the reading will show either positive or negative. On the battery module test as long as you get a reading it doesn't matter. What you're trying to see is that power is getting from the DC jack to the battery charger elements.
Keep in mind different laptops can be configured differently.
I was just trying to fix this very same motherboard, so I ran those tests and I was a bit surprised when I saw that I had voltage so I went "what the fuck, am I doing something wrong?". Then I found this video and realised that it's just freaking dead...
lol thanks anyways! At least I won't waste my time on this anymore.
what kind of camera are you using to control it with you phone?
Hi Michel, I'm using a Panasonic HC-V250EB-K. Connects via wifi to phone, and cam control with the panasonic android / apple APP.
At around 2:30, when testing the charging cable, does it have to be plugged into a wall outlet?
I have the same question for when the cable is in the DC jack?
Yes, the charger must be plugged into the wall outlet so it can get power to run the test.
@@cswbizberri4532 Thanks. I figured it out. Happy New Year.
good old Samsung, i had one do the same.
on my power supply I have a blue light indicator to show it has voltage .when I plug it in to my computer the light goes off straight away and my computer will not power up . any thoughts on this Jason.
+nicoclause Hi nicoclause. If you have a multimeter you can test the power supply. Set it to how I've set mine in the video and simply hold one of the tips on the outside metal part of the tip that plugs into the laptop, and touch the other tip on the inside of the jack. Most power supplies have a small pin in the centre. Try carefully to touch that and noting else. Should read around 19v. If it's not got a pin in the centre, then you should be able to touch the metal wall on the inside. Good luck.
My guess is that the power supply is faulty. If the laptop was faulty, the LED would stay on regardless. Clould be wrong though hence why you should test the power pack.
+nicoclause Hey, just re-watched my video and I show you how to test the power pack in it :)
hi Jason thanks for your reply its not the power supply mate . the power supply is ok until I plug it in to my computer, then the blue light on the power supply goes off , and wont charge my computer.
Hello, nicoclause. I have the same problem and I can't understand if the problem is with the power adaptor, power jack or with a motherboard. My power supply has small pin in the centre, I checked it with a multimeter - it was 3.5V but on the inside of the tip it was 19.5V. then I connected separated power jack on to the supply cable and it was reading 19V. When I connect those two to motherboard, the light on the power adapter goes off and no power is coming off. I can't understand what exactly triggers the disappearance of the power. What did you do? How did you solve it? Thanks!
Hey guys. Thanks for opening up this discussion. I am having the same issue with my Dell laptop. Multimeter reads 19.5ish volts on AC Adapter when unplugged. When I plug it into the dc jack on the laptop, the green indication light goes away on power supply and if I sniff near the hole (don't laugh lol) I can smell the residue of hot electronics which is different than the other holes... also, if I sniff on the inside of the laptop that smell does not come up. Only at the DC hole where it connects to power. Did any of you figure out the issue? My guess is that either the power supply or the laptop has a fail safe that shuts it off when it detects a short circuit to prevent longterm damage? I will replace the DC strip in the laptop and see if that resolves. If it doesn't, then I guess it's the mother board.... any thoughts y'all? T
ok so if my dell jack has power and the batt probes have power the motherboard is bad..correct…
please i have ask for you how can i connect mobile with camera like you in explain
Hi
How can you test the jacks connected via cable? if there is a video on this please let me know. Thank you
Arik Freeman Just like this : drive.google.com/file/d/0B4q_Y31tv9fRODduYk1KZVllTTA/view?usp=sharing
Hope that helps.
Jason Smart Thank you very much! and also for your swift response! :) That worked
Arik Freeman No problem :)
@@JasonSmart Thanks. That should help me too!
How did you know which pin was negative and which was positive on your first test?
Hi Light. It doesn't really matter. If you get it the wrong way around, your voltage will show a minus. You'll be able to work out which is which by that.
Isn't it a bit too early to simply swap the motherboard, the second the DC jack is fine? The DC jack isn't the only component, which can be replaced. So jumping straight to motherboard replacement seems like an overkill to me.
If the computer is not charging or getting power, it's either the battery or the dc jack, or the charger itself. If none of those fix it, then it's a bad board. Doing a SMC reset can save the day quite often, so that's often the very first thing I try.
how could u test the one that comes connected via cable cant seem to find a vid of that anyhwere.
+100timezcooler Just like this : drive.google.com/file/d/0B4q_Y31tv9fRODduYk1KZVllTTA/view?usp=sharing
+100timezcooler I tried per your picture that you sent for testing with a wire. But I get zero on my old jack so I bought a new one (for an Acer Aspire 4743). BUT I also get zero on the new one. It seems the probability of a new one being bad too is pretty small (though possible). I went to a phone/laptop repair place and they stuck their pins in the end of the the connecting tab (not the top as in in your picture) and got about 1 (or .1) readings on both using some power supply they had so said that they were BOTH were good. I thought I should get a reading of about 19 as (I tested) in the inputting charger (though my charger is not from this computer because it is missing).
Robert McClure you have your power brick plugged in and your mulitmeter set to 20v right?
Have something similar on a machine I'm looking at now. The motherboard side of the DC jack cable gives me 1V. Power adapter gives me 19V.
I'm leaning towards a bad jack, except I just replaced this jack a few months ago (was broken from case damage). And it charged the laptop fully the day before. Today no power to the board - although it does run on battery.
Looking for clarification on the 1V thing. I'm fairly confident it should be 19V and that I'm dealing with wonky power jack.
How do you know how many volts the battery port should be putting out. For example my ac adapter is 19 Volt, the dc jack is 19 Volt but the battery port is only showing 9 volt. Is that enough to charge the battery because its not charging.
Volume Up Please!!!!!!!!!!
maybe the problem is caused by some components attached to the motherboard ?...
Can't you just replace a microchip on the motherboard, instead of replacing all the motherboard?
Sometimes microsoldering/the chip is so rare or inconpatible. You have no choice but to swap mobos.
This video is useless to me... he didn't test the power jack cable or tmthe actual power plug going to the motherboard...
PLEASE HELP ME MR JASON I SPEAK GOOD LONDON MAYBE WE CAN CALL AND YOU CAN HELP MOI
is it just me, or have you connected your live "red" multimeter into the Com port when it shoud infact be the other way around?! for example when i test power adapters, I put the red one into the hole "live" and the black one on to the side of the plug. that said i am no master at using a multimeter, hence why i am asking. maybe i am doing it wrong