OK. Assuming the mainboards are good, then it's still the KB power buttons or their ribbon connectors that are suspect. Jack E/NJ
Hi @Sterces This is the button @JackE has mentioned:
When you open the service hatch cover, you will find a section similar to one in the snip which goes in to the slot, check whether it makes proper contact with the switch, inspect for any damage on the rubber, if you find any damage, you can apply a layer of electrical tape or something similar.
Good catch @brummyfan2! I couldn't see it in the photo even after zooming in.Sterces As noted earlier, the safety interlock button is supposed to cut all power to the mainboard when the top and
bottom covers are separated. They can cause intermittent problems if the
cover is misaligned with or not pressing hard enough against the switch
to keep it in the on position. You can tape a spacer on top of the button or the corresponding spot inside cover that supposed to press against it so it presses harder to keep the switch on. Jack E/NJ
Then the KB power buttons or their mainboard connections are still suspect. Jack E/NJ
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