The CPU debug indicator activates upon having more than one RAM stick installed.
The CPU debug indicator activates upon having more than one RAM stick installed.
I started my second PC and spent many hours fixing the posting issue. The CPU debug light appeared, so I re-seated the CPU, reset the CMOS, and double-checked all connections. It only worked once I added a RAM stick. I tested every slot, but it still worked with just one stick. I tried enabling XMP and adding another stick, but nothing changed. It’s frustrating because I wanted more than 16GB for hosting games.
Many details about your attempts are available, but information on the motherboard or other specifics is missing. You can still get some basic guidance, such as identifying the motherboard, CPU, RAM type and speed, without more specifics. This will help with general suggestions instead of tailored solutions.
Check if the motherboard BIOS was updated to the newest release. Your problem likely stems from one of these areas:
1. CPU (integrated memory controller) – appears normal if you tested all slots as slots 1+3 and then 2+4 work.
2. CPU socket – even after testing all four slots, it seems communication is fine.
3. Motherboard – consider updating the BIOS again. Try default settings and disable XMP. Place the dimmer switches in slots 1 and 3. The manual may label them differently, but generally skip one slot and use the next.
4. Memory socket – same as point 2.
5. Memory – verify if it appears on the whitelist for the motherboard. Since each module functions alone, it should be okay.
If you haven’t checked the CPU or bent pins, that could be a factor.
EDIT: Overlooked whether the CPU was removed and bent pins inspected.
Updated June 1, 2023 by johnno23 – added note PS
Updated the bios to the latest version, but unfortunately didn't resolve the RAM problem. The PC now boots faster, which is a plus. If I find a set of RAM for a low price, I might try it out—maybe the RAM isn't compatible or the motherboard has a technical/physical issue with two units. Thanks for your help!
Ensure the sticks are placed in slots A2 and B2, the second and fourth slots away from the CPU. Avoid using A1 and B1 (as noted earlier). Refer to the motherboard manual for details.
That was my error, 2-4 that’s the main channel I just went into overdrive. And yes, I’ve tried it—1-2, 1-3, 1-4, 2-3, 2-4, 3-4 all combinations as I mentioned before. But honestly, it can be something as basic as that, haha.