• Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Danes je 2 Februar 2026, 17:44

 [REŠENO] Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

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#1 Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a valieromarco • 28 Oktober 2023, 17:54
Slika


Slika


This motherboard hasn't sign of life, I check it but I cannot find clear shorts.

only 19,5 volt on motherboard


PL 601= 26Ω
PL 602= 13Ω
PL 501= 665Ω
PL 101 = 430KΩ
PL 201= 15KΩ
PL 301= 55KΩ
PL 701= 520Ω

Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a Google Adsense [BOT] • 28 Oktober 2023, 17:54

#2 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a matic • 29 Oktober 2023, 07:59
Hello!

Measure the voltage to ground on any pin of shunt resistor PR119.
If there is 0V, measure the resistance to ground on this resistor.

#3 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a valieromarco • 29 Oktober 2023, 12:26
Do I have to remove it to check the voltage of all pins
Both soldered pin 19,5 V is present
resistance it goes up and down maybe cause a capacitor

#4 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a matic • 29 Oktober 2023, 13:23
Measure the voltages to ground on coils PL201, PL301.

#5 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a valieromarco • 29 Oktober 2023, 13:45
Both 0V
I seen that power connector has been replaced
Voltage is only 19,5 on the mainboard

#6 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a matic • 29 Oktober 2023, 14:30
- Measure the voltages to ground on pins 1, 5, 6, 7, 9, 11 of chip PU201.
- Measure the voltages to ground on pins 1, 5, 6, 7, 11, 12 of chip PU301.

Chips PU201, PU301 pin count:
Slika

#7 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a valieromarco • 29 Oktober 2023, 16:06
PU201 I check missing capacitor PC214

Pin 1= 6,35V
Pin 5=19,5V
Pin 6 = 0V
Pin 7 = 0V
Pin9 =2,77V
Pin11= 0V


PU301

Pin1= 4,8V
Pin5=19,5V
Pin6=0V
Pin7=0V
Pin11=5V
Pin12=5V

#8 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging  [REŠENO] 

Napisal/-a matic • 29 Oktober 2023, 17:39
valieromarco napisal/-a:I check missing capacitor PC214
This capacitor is important for stable operation of the chip PU201. It must be soldered.
PC214= 1µF/6.3V, ceramic type X5R, package 0201

Measure the resistance to ground on pin 11 of chip PU201.

#9 Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a valieromarco • 29 Oktober 2023, 18:35
Wow
Solved!!!
Problem was the missing capacitor.
In this case I don’t understand how missing a capacitor cause a completely motherboard dead.
Usually is normal if it is shorted but in this case I don’t understand it.

Re: Acer Extensa 215-21 Motherboard NB8607_PCB_MB_V4 dead no led not battery charging

Napisal/-a Google Adsense [BOT] • 29 Oktober 2023, 18:35
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