Invalid RAM slot?

Question

Iron

They brought the system unit for repair with a claim that the computer starts but does not display an image. I started the diagnostics with the installation of a working video card - the same thing. Then I put a post card, there are four dashes on it. After that, I removed one bar of RAM and the computer started successfully. It turned out that the first slot for RAM does not work - I put a working bar in it. But for the sake of the experiment, after half an hour, I once again installed a RAM bar in this non-working slot and the computer also started and produced an image. I try to test - it works. Bad contact in the slot?

Answer 1

1. Bad contacts in the memory slot. Check visually for damage. Clean up.
2. Problems with the power supply. Power problems on the motherboard.

Answer 2

Contacts in the slot, capacitors, legs under the processor, power supply. You can run memtest in this slot with each bar in turn if it starts.

Answer 3

Another possible case:
A contact somewhere leaves due to a microcrack in the board due to a change in temperature. Once I successfully sent a motherboard to Gigabyte for warranty treatment, they accepted it, did something (baked it with a hairdryer?), sent it back. At the same time, she generally groaned a couple of test memory dice for me