How to Diagnose Fault CPU Power Supply Chip, A Common Issue in Dell E5420 turns on and off

In this video, I will show you how to diagnose and fix laptops that turn on and off with no display, particularly Dell Latitude E5420. The most common cause of such a problem is missing CPU voltages that enable the processor to turn on and display images on the screen.
I used a digital multimeter to measure all the voltages on the motherboard then I measured for short circuits on the power supply chip pins using a multimeter in continuity mode, I discovered an internal short inside the chip MAX17411 on the internal regulator power supplies.
I used a Gordak 868A power supply to disorder the chip of the motherboard, unfornutely I could find the chip within my donor board. I order it and will post part 2 of this video while replacing it when I receive it.
Thanks for watching don't forget to like and subscribe if you enjoyed this video.
#Dell #E5420 #onandoff #noDisplay

[@willwalker2672]

Great methodical explanation of accurate fault diagnosis. ✔️

[@platinumphonesandcomputers]

Thank you

[@mathewszhomwa3073]

thank you so much, you are a good teacher

[@platinumphonesandcomputers]

Thank you! 😃

[@dzabakwesi2213]

Thanks for the fix. Please what is the name of the flux you are using for desoldering the IC?

[@okgeni1696]

Keep it up great diagnosis

[@platinumphonesandcomputers]

Thank you

[@ronaldkahwa3610]

Thank you brother for the video

[@francisn442]

For a phone: If the capacitors and connectors are badly damaged, can one transfer the cpu and ram to a working same model motherboard? Would it work, would it required any other chip transferred? That's where the focus is data recovery

[@platinumphonesandcomputers]

Usually that doesn't work in smart phones due to data encryption

[@tauraimachingura]

Thanx bro

[@TechnoEveryday]

Hi, My Dell E5420 is not turning on.
Another charger has been tested on it
When i apply power to it, battery charging led turns on for a second and turns off (battery pack is removed).
After this, if I press power button on the laptop, power led turns on for a fraction of a second and turns off. Fan doesn't move, HDD doesnt start, no LCD screen. If I press power button again, the power led this time doesn't turn on. If i reapply power from the mains, the cycle can be repeated.
I removed battery pack, CD-ROM, RAM, WI-FI card and HDD and applied power, nothing changed.
I removed and reinserted CMOS battery to reset the BIOS but nothing changed again
I can check 19.3VDC coming at various points on the motherboard.
I can't find any voltages on any of the buck converter coils (perhaps because it is shutting down immediately?)
Please help me to resolve this issue. I'll be very thankful to you
Thanks in advance

[@lexbeltran1354]

It's probably a bad power button or short circuit somewhere. My Dell latitude e6430 is having the same problem. I'll never buy a Dell PC again.

[@YagoMetroidBass]

Hi... do you have the schematic of this board?

[@platinumphonesandcomputers]

Its there on the internet search by its model or board number

[@ErickMaxwell25632]

I have a question, how do i test components around the cpu that is mounted on the board cause for example when i test the capacitors around them they behave as though they are shorted. same with the Coils. so how do i go about that issue?

[@williamsiansala7256]

I think a completely shorted chip has all caps connected to it appear to be shorted, one cap shorted instead of all caps around the chip would be tricky

[@williamsiansala7256]

The method of test ic pin using multimeter with ic data sheet is good for those who avoid burning the motherboard by injection of voltage and suitable for those who do not have thermal cameras to pinpoint hot areas (shorted components)

[@ahmetcoban1008]

Isn't the cause of the fault max17411?Is the motherboard working now?

[@ahmetcoban1008]

hi..max17411 does it work after replacing?