I have the same mobo, on your BIOS and EC dumps it power up and fans go full speed after few seconds, no display. Old dumps got deleted by junior serviceman, need 100% working ones for both chips.
On old, corrupted BIOS mobo got stuck on HP logo during post.
Lenovo X240 works fine, charges and discharges both batteries but won't boot after shutdown untill both batteries are unplugged. After that boots and works fine again. BIOS or hardware?
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