- Nov 22, 2010
- 109
- 0
- 18,680
Hello, I am having a problem where my motherboard refuses to use any ram stick I put into the A1 slot. It won't boot either if I only have a stick in the A1 slot, it'll just remain on a black screen when I switch the pc on and not do anything. My motherboard is a A55M-HVS. It only has two ram slots: A1 and B1. Now the motherboard does boot up with ram in the B1 slot. What's really weird is if I have ram in both slots, the motherboard boots up and sees the ram in both slots (it states the total amount of memory in the BIOS correctly.) However when I go into windows (I'm using windows 7), it states that I have the correct amount of memory, but only the amount in the B1 slot is usable. CPUZ also reports the correct amount of ram I have in both slots. Also if I check the BIOS with ram in both slots, it says it is running in single channel mode. I am using ram sticks that came in a pair and I know both are working because I tried each one in the B1 slot and they worked fine. I tried resetting the CMOS, resetting to BIOS defaults, slightly loosening the cpu backplate screws as well as some of the screws near the ram slots on the motherboard, and even took the processor out and checked the pins. Nothing worked. I just don't understand what is happening here. If the A1 slot was bad, wouldn't it not see the ram I put in there? How come it still shows the correct total amount of ram when I have both slots occupied? CPUZ even recognizes all the information about the ram stick in the A1 slot, like the brand, part number, etc. But no matter what I do, I cannot get the motherboard to boot with only 1 stick of ram in the A1 slot, and I cannot get windows 7 to use it when I have both slots occupied. If anybody could help me out with this, it would be greatly appreciated 
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