I have acquired a Zenith SupersPort 286e without its battery but with its (seemingly working) power supply.
Sadly, the computer doesn't boot at all, nothing happens when I flick the On/Off switch. The power supply seems to work as it does a small white noise when plugged.
I have disassemblied it and everything seems intact, no rusted or corroded parts, everything looks ok.
The only thing that seems missing is a chip under the computer that is accessible via a small screwless trap. There is a 40 pin socket (2 rows of 20 pins) that measures 1.8 × 5 cm.
This is the only thing missing, and I think its only an extension as it can be accessed without disassemblying the computer.
What could be the cause the this Zenith SupersPort 286e not booting at all? What component could be dead (motherboard, CPu, hard drive...) that could cause the computer to not do anything when turning on the computer?