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If you are unfortunate enough to set a password for your BIOS password for PC and forgot it, chances are you may need to send it back to the manufacturer. Not to worry yet, you still can try out some tips and tricks to bypass or unlock the BIOS password: BIOS passwords can add an extra layer of security for desktop and laptop computers. They are used to either prevent a user from changing the BIOS settings or to prevent the PC from booting without a password. Unfortunately, BIOS passwords can also be a liability if a user forgets their password, or changes the password to intentionally lock out the corporate IT department. Sending the unit back to the manufacturer to have the BIOS reset can be expensive and is usually not covered in the warranty. Never fear, all is not lost. There are a few known backdoors and other tricks of the trade that can be used to bypass or reset the BIOS password on most systems.
If the cable is known to be working then there
is a 90% chance it's a scaler chip problem (the "ANA" or "HANA" chip
connected directly to the AV cable) in rare cases it is the GPU.
1) (Ideally) Send it back to microsoft 2) Get your board reflowed. 3) Try one of the X-clamp mods (following a motherboard reflow if at all possible.). 4) Take a heat-gun to your box 5) Try "the towel trick"