HP ENVY x360 15m-dr0011dx 8 Beeps

[KappaDev]

I have an HP Envy x360 15m-dr laptop which sometimes beeps 8 times on startup and sometimes gets no beeps at all (both with no picture).
Power button light comes on, fans spin and stop after a few seconds, then screen stays black with no picture. If the machine decides to beep 8 times, it shuts off immediately after. According to what I could find, 8 beeps was corrupted BIOS.

Made backup of original BIOS (attached). Attempted to flash BIOS with extracted bin file from HP BIOS update. Screen showed "Updating boot block", rebooted and immediately back to 8 beeps and no picture. Not really sure what this could be. Anyone ever seen a bad BIOS chip? Maybe bad startup chip?
Not sure where to go from here.

Thanks.

[mcplslg123]

Re: HP ENVY x360 15m-dr0011dx 8 Beeps

Try with another flash drive. Was the bios chip located close to SOC?? If yes, it could be dry solder joints under SOC which are at play here.

[KappaDev]

Re: HP ENVY x360 15m-dr0011dx 8 Beeps

Try with another flash drive. Was the bios chip located close to SOC?? If yes, it could be dry solder joints under SOC which are at play here.

Hi, reflowed chip and now get 8 beeps consistently. Flashed BIOS with both original and extract bin from HP updater but same story. Could the EC needs to be flashed? I'd solder wires directly to the SPI pins if so, but unfortunately without schematics I have no idea where they are.

[mcplslg123]

Re: HP ENVY x360 15m-dr0011dx 8 Beeps

8 Beeps is usually indicator of GPU failure failure/LVDS cable or screen failure. Try with another lvds/edp cable and screen. Do you get image on hdmi?? Numlock glows on external usb keyboard??