I have just increased the memory from 2+4GB to 8+8GB and now I cannot turn on the All in One. The switch at the left side does not light up when power is connected although the power is to the motherboard with the small light above the socket is lit.
I have tried replacing the old memory and that does not have any effect also I have read that removing the hard drive may cure the problem that also does not make any difference.
Hello Erico, thank you for your reply I will clarify, the 23-b090ea was supplied with 2 RAM slots 1x 4GB and 1x 2GB, video editing ran very slowly so I got a RAM check from Crucial and bought 2x 8GB modules. The PC is limited to 16GB.
After powering down I removed the rear cover and cover over RAM removed the 2 units and replaced with 8GB, put covers back plugged in power and the on button did not switch on so took the back cover off. The light I referred to is close by where the power plugs into PC. There is no power cable or bulb by the on/off switch.
I have put the original memory back and still cannot get the PC to switch on.
Read somewhere that it could be stored power that is stopping it working but don't understand that.