Hi guys

Hoping to get a resolution. 

I. Just got a refurbished M4800 and on setting up, I noticed it will randomly go into standby.

I eventually found that pushing down on the palm rest was what was causing this. Any ideas how I can solve this? I looked at a disassembly video and can't find anything that looks like a sensor there.

Any other ideas please? As this is rendering the laptop unusable

Thanks