Friday, March 11, 2011

Short circuit caused by dual-channel memory errors


Recently, I bought an nForce2 chipset motherboard, with the two Samsung DDR333-256M of memory. Test in business is good, take it home plugged into the chassis after, the system issued a warning sound, can not enter the system.

Failure phenomenon: the motherboard into the chassis after the fixed, connected and power lines, data lines, the reference manual, the memory into the memory slot 1,3, powered on, the system issued a warning sound, makes the display can not point light, the system can not enter. Replaced by 1,2-memory slots is the same phenomenon. The use of a single memory slot is all normal.

Troubleshooting: The use of the memory slot 1,3 or 1,2 can not enter the system, using a memory slot alone can enter the system, which can be judged that the memory slot 2,3 problem. I thought for a moment could be back in business when the test is a good memory slot 2,3-ah! Certainly in the process of installing a problem. So I open the case one by one investigation found that the original chassis has a fixed board screw for metal feet, just 2 memory slots located in the following, very suspicious (this metal pin for fixed original KT133A motherboard screws, with the new motherboard holes does not match). So after I pulled out this metal feet, re-installed the motherboard, then all sorts of data lines, power lines, the boot, everything is normal. Then I re-installed Windows XP. It seems indeed that the exposed metal foot against the memory slot of the welding point, affecting the use of the memory slots.










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