There are two spots for memory one on the back and one underneath the keyboard.
I replaced the memory underneath the keyboard and now it wont boot. I tried installing the old memory again and it does the same thing.
The power light turns on and the cpu fan turns for less then a second then the processor just heats up and it does nothing
I tried unpluggin the battery and power supply and turning it on, and removing the bios battery......still does the same thing. any help?
How was the RAM under the keyboard attached to the motherboard? What did you do to get it removed.
The eMachines M5310 Owners Manual says nothing about removing the under-keyboard RAM for a RAM upgrade.
I think it's possible the RAM under the keyboard was never meant to be removed. eMachines M5310 Notebook Users Guide
Sometimes machines are very finicky about their memory.
Did you return the machine to it's original state, and it didn't boot? Why not just install your new module in the slot on the bottom of the machine? Are you sure you aren't reaching the memory limit on your machine?
If you returned it to it's original state and you had no POST, try stripping the machine down to just a board, CPU, heatsink, the factory memory, and an external monitor. Try and get it to boot then.