HP 830 G8 has black screen and caps lock led on

[bliblablou]

Hello !

After opening an hp elitebook 830 g8 because i wanted to read and write EC chip for unlocking BIOS, the computer has black screen and caps lock led on. Not blinking, just on.It begins at the time I've reconnected the battery or at the time i plug the DC power, before i push the power button.

That's weird because i didn't succeed to write the chip because my wrench was not the good one (too large). I've tried disconnecting the battery, the cmos, the ram and drive and reconnecting everything, not working. i've tried on DC with no battery, not succeed. I did not fund the meaning of this error signal, people are talking about bios issue, seems true because it happens directly when connecting power. But it's weird that it happens before i power on with the on/off button...

Does someone face the same issue ? Is it possible that i've damaged the ec chip while using the wrench ?

Sorry for my bad english.

Thanks in advance.

[rogfanther]

Depending on the size of the clip you tried using to read the bios chip it is possible to have damaged the board, yes.

Can you post good, clear photos of the area of the bios chip, and also of the suspect clip ?

[pc_okay]

Did you disconnect battery becore playing With your wrench?

[bliblablou]

yes battery was disconnected while trying to use the wrench. Here some photos of the motherboard and the EC chip

[Tim.K.]

Any updates on this?

I have same issue, no screen/no backlight, laptop tries to turn on, CAPS solid on, power led blinking orange, around 15sec, turns off, and same cycle again.
All main voltages is presented, except any CPU activity.
Tried to flash EC and BIOS, no success.
there is no visible damage to board, no shorted (hot) smd.
Gonna try to find some info about Boot Sequence, it's tough to check smth because of BGA parts...
Can it be faulty Thunderbolt controller?