Chosen Solution
Overnight my B590 developed a memory fault. On boot up, a single long beep, and the machine would drop into the bios. Upon running the inbuilt memory diagnostics, I found that values being written during the test were coming back with a single bit always set to 1. Did usual reseating of the DIMM, changed the DIMM location, swapped the DIMM with a new module. Same error, indicating that this was probably a motherboard issue. Ran memtest86 (4 passes) from a USB drive with no errors. On rebooting, Windows started up as usual. Q1: Why did this work? I can only speculate the memtest somehow cleared the stuck bit on the motherboard. Bad capacitor? Q2: Is this problem likely to resurface?
I would just wait and see.
Hello, my theory behind this issue is dust in the first place, and by changing and replacing the DIMMs you had to move your laptop upside-down multiple times which might cleared the dust and the memtest86 was just a lucky step. If this happen again, don’t move your computer, try to run it normally multiple times to make sure the problem happen at 100% and then run a memory test, if it works then it’s a software issue if not then it’s a hardware.
