Thursday, April 19, 2007

Computer Memory Troubleshooting

* First if the computer has a memory expansion board, determine if the faulty chip is on the memory board or the motherboard. If the parity error came up during the RAM check it will stop at the number at which the faulty chip is located

* If the fault is with the memory card hopefully a RAM chip testing program will have come with the card when you purchased it. This program will locate and often display graphically where the faulty chip is. If you don’t have such a program use the same procedure as outline on the succeeding notes.

*It is hard to track down the exact chip which is bad on the motherboard because each BIOS (which sends the error message) for the clone uses a different error message coding. Finding the faulty chip can be a radius task

• Take out all memory cards.

• Try pressing down on all the RAM chips on the motherboard, sometimes corrosion will affect the contacts and cause the parity error. Pressing down on the chips helps, seat the chips and improve the connections.

*Take out the last bank of chips and change the DIP switches to check any changes in the amount of memory installed.

• Do you still have a parity error? If not you know that the bad chip is one or more of those nine installed chips. Replace it one at a time with the nine chips that you just removed. Turn on the computer after installing each chip to see if a parity error pops up. If it does, you know you have found the bad chip Replace any bad chip’s) with new one’s).

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