RAM slot a1 and a2 not working

If a known good DIMM is not seen in a certain slot, first make sure that the slot is enabled in the BIOS program (F1 key or Del key on IBM logo

RAM slot a1 and a2 not working second ram slot not doesn't work second ram stick not working second dimm slot not working

If a known good DIMM is not seen in a certain slot, first make sure that the slot is enabled in the BIOS program (F1 key or Del key on IBM logo

dimm slot If the module works in one slot and not the other, the slot is bad

That's a frustrating problem! It does sound like a dimm slot unfortunately however there are a couple of things you can do I would begin

dimm 2 slot Seems to possibly indicate a defective Motherboard DIMM Slots 0 Likes

Remove all RAM sticks and place one you know is functional into the first slot on your motherboard Boot your computer If it starts without problems, you know