HP PROBOOK 640 G2 not working

[bogdan2390]

I have this model HP 640 G2. Tried to update like 5 BIOS and nothing. It does the following things:
1. I plug the charger
2. At plugging in the charger the lights go on, the 8pin on BIOS gets 3.3V and then after 2-3 seconds, all dies, no voltage on BIOS pin8. Only on the power button 3.3V and 2 coils from the entire board have 3.3V and 5V.
3. I have 3.2V on battery charging pins.
I cant find a schematic. What should I look after? Maybe I need to spend one more day yo try more bios? Thanks!

[PacoGT]

Re: HP PROBOOK 640 G2 not working

I have the same problem and I checked and I think it's a bios problem but I'm not sure

[mcplslg123]

Re: HP PROBOOK 640 G2 not working

This board has DSW(Deep Sleep Well)-so its natural that 3V/5V will appear momentarily when plugged in. Then it'll go in DSW mode. Those voltage will come back only after trigerring.