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‎11-29-2018 04:10 AM - edited ‎11-29-2018 04:46 AM

HP Recommended
Product: Probook 4520s

Hello, 

I am bit stuck with my 4520s. I had it upgraded to more ram and a kingston ssd, installed win 8.1 and upgraded to 10. Worked like a charm untill the OS rebooted and now it stuck, no blinks, no beep codes, no image on the screen or external monitor. Swapped the parts with a faulty identical laptop, confirmed the cpu and ram as working. I tried to get it into bios recovery mode and it starts to blink the caps lock (no pattern, just continuos regular blinks), wifi led is orange on and no image or any other signs. Already tried to reseat, swap, replace ram modules to no avail. Also tried to remove the cmos battery, power cycle, new cmos battery, followed instructions on the official support page. One last thing to try is to hook up the laptop's display, not really sure if it is able to send signal to the external screen while in bios recovery mode, something tells me it should make no differance.

Can anyone shed some light?

 

Appeciate it,

Violeta

1 REPLY 1

‎12-02-2018 02:47 AM

HP Recommended

as an update, i had my second hp 4520s (the one with the faulty gpu) into bios recovery mode and noticed the same pattern, no image on either screens, continuos flashing caps lock and no other reaction at all. If i exit this mode i get image on my screen. I tried so far about 5 usb drives ranging from 32 gb to 1 gb, all formated with fat 32 (mannualy and with the bios update utility) and got no answer. Anything specific about the usb drives i might be missing?

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