Hye , i'm beginner to and thanks thanks, choukrane for all video you make , you are a Very good teacher and i learn a lot of thinks . On apprend beaucoup plus avec tes vidéo que d'autres !!!!!
Thank you very much for your patience in your explanations. I didn't find any other you tube videos such as yours. I really enjoying your videos. Best regards I have laptop Dell i5 second Gen old one. Battery dead worked only when adapter connected. But last week it didn't start. As soon as I plugged in the power adapter the adapter light goes off. But adapter is 19.5v showing in the multimeter. Please give me a guidance to check the fault in the laptop. There is a second laptop thats also i5 battery dead, starts, blue power LED lights also Fan starts then Fan stops thats all no display but power light ON.
The black or blue strip on electrolytic capacitors serves to indicate the negative terminal (cathode) and is part of the capacitor's visual identification system. The difference in color-black, blue, or sometimes other colors-can depend on a few factors: 1. Manufacturer Preferences Capacitor manufacturers use different color codes to distinguish their products or series. For example: A black stripe might be used for general-purpose capacitors. A blue stripe might signify a specific series designed for higher performance, such as low ESR (Equivalent Series Resistance), higher temperature tolerance, or longer lifespan. 2. Voltage or Capacitance Ratings Different colors might indicate specific voltage or capacitance ranges. For example: Blue stripes could signify capacitors with specific voltage ratings or those designed for special applications, such as power delivery circuits. Black stripes might be standard for general-use capacitors. 3. Quality or Application Grade Blue-striped capacitors may represent premium quality components used in critical power circuits, while black-striped ones might be for standard use in less demanding areas of the motherboard. 4. Aesthetic or Functional Design Some manufacturers may use different colors for ease of assembly or visual identification during production and repair.
If your Dell laptop turns off 5 seconds after powering on, it’s usually a sign of a hardware fault or power issue. Here are the common causes and steps to diagnose: RAM Issues: Faulty or improperly seated RAM can cause the system to shut down. Solution: Remove the RAM, clean the contacts, reseat it properly, or try with a known-good RAM stick. Overcurrent or Short Circuit: A short circuit in one of the power rails (3.3V, 5V, CPU power, etc.) can cause the laptop to shut down automatically. Solution: Use a multimeter to check for shorts in critical power lines. Focus on the MOSFETs near the power input and CPU circuit. CPU or GPU Fault: If the CPU or GPU isn’t receiving proper voltage, the system won’t complete the power-on sequence. Solution: Measure the CPU core voltage and GPU power rail to ensure they’re present. BIOS or Firmware Issues: Corrupted BIOS can prevent the system from starting properly. Solution: Try performing a BIOS reset by removing the CMOS battery for a few minutes or reprogramming the BIOS chip. Motherboard Faults: Faulty components like capacitors, power ICs, or charging circuits can trigger a shutdown. Solution: Visually inspect the motherboard for burned or damaged components and replace them if needed.
As beginner in eletronics this is gold video for me! A ton thanks!
Great to hear
Hye , i'm beginner to and thanks thanks, choukrane for all video you make , you are a Very good teacher and i learn a lot of thinks . On apprend beaucoup plus avec tes vidéo que d'autres !!!!!
golden knowledge
Thank you
Thank you very much for your patience in your explanations. I didn't find any other you tube videos such as yours. I really enjoying your videos. Best regards
I have laptop Dell i5 second Gen old one. Battery dead worked only when adapter connected. But last week it didn't start. As soon as I plugged in the power adapter the adapter light goes off. But adapter is 19.5v showing in the multimeter. Please give me a guidance to check the fault in the laptop.
There is a second laptop thats also i5 battery dead, starts, blue power LED lights also Fan starts then Fan stops thats all no display but power light ON.
Thanks for your kind words. I'd suggest checking the power jack and DC-in connector, and the power board for any shorts or damage.
I really love your videos..
Glad you enjoy them!
Great job !
Thank you
Deja vu. Do you create any 'repair' videos?
Soon, btw this is a new video
@@electronicsrepairbasics_erb Thank you. I hope to review some repairs. I said 'Deja vu' because these videos cover the same material.
Please do a video on voltage injection
Unfortunately I don't have a voltage injector, but I hope to in the future.
Why some capacitors in that board have a black strip and others a blue one for the negative ?
Different chemical inside it
The black or blue strip on electrolytic capacitors serves to indicate the negative terminal (cathode) and is part of the capacitor's visual identification system. The difference in color-black, blue, or sometimes other colors-can depend on a few factors:
1. Manufacturer Preferences
Capacitor manufacturers use different color codes to distinguish their products or series. For example:
A black stripe might be used for general-purpose capacitors.
A blue stripe might signify a specific series designed for higher performance, such as low ESR (Equivalent Series Resistance), higher temperature tolerance, or longer lifespan.
2. Voltage or Capacitance Ratings
Different colors might indicate specific voltage or capacitance ranges. For example:
Blue stripes could signify capacitors with specific voltage ratings or those designed for special applications, such as power delivery circuits.
Black stripes might be standard for general-use capacitors.
3. Quality or Application Grade
Blue-striped capacitors may represent premium quality components used in critical power circuits, while black-striped ones might be for standard use in less demanding areas of the motherboard.
4. Aesthetic or Functional Design
Some manufacturers may use different colors for ease of assembly or visual identification during production and repair.
@electronicsrepairbasics_erb small details but useful when replacing them 👍
Brother please describe all EC pins with all signals requirement for ec and pch
That’s a great request, I will look into adding EC pin information in the future.
Please sir , my Dell laptop turns off 5 sec after it's on. What's would be the issue?
If your Dell laptop turns off 5 seconds after powering on, it’s usually a sign of a hardware fault or power issue. Here are the common causes and steps to diagnose:
RAM Issues:
Faulty or improperly seated RAM can cause the system to shut down.
Solution: Remove the RAM, clean the contacts, reseat it properly, or try with a known-good RAM stick.
Overcurrent or Short Circuit:
A short circuit in one of the power rails (3.3V, 5V, CPU power, etc.) can cause the laptop to shut down automatically.
Solution: Use a multimeter to check for shorts in critical power lines. Focus on the MOSFETs near the power input and CPU circuit.
CPU or GPU Fault:
If the CPU or GPU isn’t receiving proper voltage, the system won’t complete the power-on sequence.
Solution: Measure the CPU core voltage and GPU power rail to ensure they’re present.
BIOS or Firmware Issues:
Corrupted BIOS can prevent the system from starting properly.
Solution: Try performing a BIOS reset by removing the CMOS battery for a few minutes or reprogramming the BIOS chip.
Motherboard Faults:
Faulty components like capacitors, power ICs, or charging circuits can trigger a shutdown.
Solution: Visually inspect the motherboard for burned or damaged components and replace them if needed.
Why you are not showing any desktop motherboard? How effective debug card's are ?😇😇😇😇😇
Very Soon, thank you
🫡 merci chef