Question about Computers & Internet
Hi there, I've been having problems with my pc for a few days now, with it trying to restart itself automatically and not being able to start at all sometimes. I was getting a bluescreen for a split second, saying PFN_LIST_CORRUPT and a bunch of other stuff that I couldn't read as it just flashed on and off so quickly. I was told that it could be a memory problem. My motherboard is a Biostar M7NCG 400 and there were 3x sticks of 512Kb Ram in it. I removed the stick from DIMM Slot B2, Restarted the PC & it worked fine (showing 1Gb of RAM now instead of 1.5Gb). I defraged the pc & ran the following programs; RegscrubXP; AVG; CCleaner; Ad-aware & SpyBot S & D. It ran for approximately 12hours yesterday without restarting. Today, I decided to swap the removed ram stick with the one in Slot B1 and again it worked fine. I decided to try the other stick back in the B2 slot and on restart, had the same problems with restarting automatically etc. I also saw a blue screen at various times over the last few days, saying something like IRQ, but again, it flashed on and off so quickly that I couldn't read it properly. I'm suspecting it's a motherboard issue, but I'm no expert and I'm wondering if there is any way to test the motherboard to see what the problem actually is. Other system details as follows; CPU = AMD AnthlonXP 2400+ Power supply = 230v Graphics = Nvidia Quadro4 700 XGL 1x CD ROM & 1x DVD-RW 2x HDD 1x Modem (not used)
Some ram may only fail at high temperature.
pls use 512mb of ram or an single chip and check ur pc.
Posted on Jan 04, 2008
I have worked on several computers with simular problems. First your ram. Are you making sure that the ram sticks all have the same speed? the other thing you might want to look in your manufacture technical books to see if you are using the right amount of ram for that specified slot. Many motherboards have maximum ram for each slot. Speed of your ram sticks is very important never mix them together. always use the same speed. Using varing speeds you could have a whole host of problems. I found that if you mix the speed of the ram sticks you can cause the registry , bios and even your IRQ settings to malfunction or make entries that cause your computer to fail. The other thing I see is you might want to up your PSU 230W for a AMD and the graphics card is quite low. I would recomend at least a 450w or even a 500w dual 12 volt rail. This will make sure that enough power is going to your motherboard and also to your graphics card. Note: Using mixing speeds on your ram sticks over time can cause perminate damage. When your PSU is under powered you can also have what i call creeping problems. What I mean by this is that as the PSU gets overloaded slowly things begin to malfunction eventually leading to a full shut of your PSU. I have only seen on a few overloaded PSU it damaging a componet on your motherboard. But once again it all depends on how it happened and what was the load when it occured. I hope this helps if you have a comment or more questions feel free to contact me.
Posted on Sep 22, 2007
Hi, in my repair workshop I have seen this problem several times and almost always it is a problem with blown capacitors on the mobo. When you have the case open again inspect the capacitors, [they are the round objects grouped together in lots of 5/6 on your bourd] If any show signs of bulging at the top or leakage from the bottom, unfortunately its time to replace the mobo. This can be fixed but the labour cost will almost equal a new board. Goodluck mistyman
Posted on Sep 22, 2007
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