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what can cause the memory slot to be defective?

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  • Memory
  • Computers
  • Motherboards
Last response: in Memory
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October 11, 2014 10:31:12 AM

On this new FoxConn motherboard(865G7MF-SH) I used, I discovered that one of the Memory slots was defective. If I insert a RAM Bar compatible with the motherboard, the computer would not boot. This happened even when I inserted 2 RAMS of the same type, into both memory slots. I would have to remove the one RAM bar from the above mentioned slot to get the computer to boot.it is the slot furthest from the processor. The only thing I noted was a slight scratch on the back of the board leading from it to the other memory Slot.The computer works otherwise.
any advise/suggestions are welcome.
simonchipmunk

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a b } Memory
a b V Motherboard
October 11, 2014 10:56:02 AM

What size and speed is the RAM? I was thinking it might have been larger RAM than it could support but checking the specs, the maximum it supports is 2GB and the max DDR non ECC size was 1GB, so you can't add to much RAM. I also checked it's a socket 775 motherboard and at that age, anything could be the cause. Could be the RAM stick itself, could be the RAM slot is damaged, or has dust, a very small amount can have an effect, it may be a BIOS setting is corrupted, voltage changed, etc.
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October 12, 2014 8:49:01 AM

chicano,thank you for your response. when i purchased the motherboard and CPU combo, the seller installed the CPU plus heat sink and fan, and also installed a 512 MB DDR PC 3200 Mhz RAM Bar,which is compatible with the board specs. I had purchased 1024 MB and 512 MB RAM PC 2700 DDR bars, also compatible with the specs. But when i inserted the 512 MB Bar into the slot furthest from CPU, and the RAM BAR in the first slot,the computer would not boot. when i inserted the 512 MB bar in the first slot, and the 1024 MB Bar in the second slot, the same thing happened. So I had to be satisfied with using just the 1024 MB RAM Bar in the first slot(closest to the CPU).
I happened to look on the back of the board and there was that scratch I mentioned in my earlier post. i had a tech look at the board,and he said not to worry about the scratch,it was superficial and hadn't hurt any of the tracks.
the computer boots up normally,and works fine.it is running Windows XP Pro.
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October 12, 2014 8:50:38 AM

ii forgot to mention that the motherboard and CPU combowas advertised as new.
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a b } Memory
a b V Motherboard
October 12, 2014 4:05:04 PM

Well, looks like different ram size and speeds have caused the issue, or maybe the new 512MB PC2700 module is bad.. if used. You did not mention having tried the 512MB PC3200 module with the 1024MB PC2700. So did you?.

Your motherboard specifications say it has Dual Channel memory support.. this means it will run best with both RAM slots populated with the same size and speed ram. if you install single channel memory it may have issues, and using different size and or speed ram can make it run on single channel. Using a single module will also cause this, but the boot issue may depend on both slots running on single channel. So, try using two identical size and speed modules for best compatibility, and also update the Chipset driver and BIOS.

http://www.foxconnchannel.com/ProductDetail.aspx?T=moth...
http://ark.intel.com/products/27707/Intel-82865G-Graphi...®+865g
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

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October 12, 2014 7:51:40 PM

Dear chicano,
I also tried using two identical RAMs of 512 MB each, 2100 MHz DDR, and the computer would not boot. it would boot with one of the bars in the first slot nearest the CPU, but not the second slot. the 512 MB, DDR ,2700 MHz RAM Bar ,I discovered was bad,as installing it alone resulted in no boot. itried it on another board with which it was compatible resulted also in no boot.
I was using a new 400 Watt ATX 20/24 Pin ATX power Unit with floppy,SATa,4 Pin-12 V ATX, and Molex connectors. it worked for 3 days ,then conked out 4 hours ago.it is deader than a doornail. it looks like I need to get another power unit, and junk the motherboard?
The support for the board has ended and there are no BIOs Updates available , asthe board was phased out.
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a b } Memory
a b V Motherboard
October 12, 2014 11:55:30 PM

Yeah, junking the motherboard would be the wise thing to do... who knows if it killed both the PSU and RAM stick. If you must keep using the motherboard, don't risk a good quality PSU... get a cheap one that won't matter if it soon croaks..

That may sound ludicrous but I've read of motherboards killing RAM, PSU, CPU, even HDDs. One guy said, the mobo went though 20GB of RAM before he caught on to it. A bad PSU may damage the mobo and the mobo in turn damage the next PSU and other components.

Take the opportunity to upgrade the computer to recent hardware... you don't have to spend much to acquire recent component... you can get very inexpensive components for not much more than 775 components. You can buy 2GB of DDR3 RAM for $22.00, a much faster CPU/APU than your Pentium 4/D for $40-$45, and a compatible motherboard starting from $30.00 or less.

DDR3 RAM
http://www.newegg.com/Product/ProductList.aspx?Submit=E...

AMD APUs (socket AM1 & FM2/FM2+)
http://www.newegg.com/Product/ProductList.aspx?Submit=E...

AMD motherboards (sockets AM1 & FM2/FM2+)
http://www.newegg.com/Product/ProductList.aspx?Submit=E...


Intel socket 1150 G Series CPUs
http://www.newegg.com/Product/ProductList.aspx?Submit=E...

Socket 1150 motherboards
http://www.newegg.com/Product/ProductList.aspx?Submit=E...
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October 13, 2014 6:02:40 PM

chicano, thank you for the information.
In re. your asking if i mixed the two different RAMs, no I did not. you don't mix apples with oranges to get orange juice.
Re. getting newer components, I am scared to death, about installing a processor. I have never done it. I will have some one who knows how, do it for me, and also to select the correct processor to go with the motherboard.
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a b } Memory
a b V Motherboard
October 13, 2014 9:39:46 PM

There is really nothing to it... the CPU can only go one way into the socket so there is no way to install it the wrong way without bending the CPU or socket pins. But, if you don't feel comfortable doing it yourself.. that's as good a reason as any to have it done.
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