help with hp 640 g1 no display

[jesi]

hi there everyone


hp probook 640 g1 6050a2566302-mb-a04

comes on to no display

came with this fault , i have flashed the bios with almost 18 files from here
and other places, still the same

i can see the lcd come on but no graphics , forced the lcd backlight on with 3.3v

but still no graphics , looking for a cpu to test if thats the issue or not

any ideas welcome

thanks in advance

hp hp

[ktmmotocross]

Re: help with hp 640 g1 no display

on external?

[mcplslg123]

Re: help with hp 640 g1 no display

I think your mb is not posting at all. The backlit on screen glows as you have forced 3.3v on it. Numlock glowing on usb kbd??

[jesi]

Re: help with hp 640 g1 no display

hi there

thanks for the reply


no lights flashing on keyboard caps and num lock nothing

no display on external port

waiting for a cpu to test before i do a chipset reball or reflow , but want to
check cpu first

any other things you think i need to test

thsnks

[alas3376]

Re: help with hp 640 g1 no display

you got a serious issue, probably cpu