Dear friends,

I have fallen in big trouble. I tried to test the processor of a dead PC on a working one. Now even the working one has failed.

What I had done was, picking the processor labelled Intel Celeron 1200/256/100/1.5 (SL656) from the dead PC and replacing it with the one in the working PC whose actual processor is Intel Celeron 900/128/100/1.75 (SL5LX). I wanted to verify whether the fault in the dead PC was a problem with the processor. When I turned on PC, only the fans were running, the BIOS strip could not load.

When I later replaced back the processor of the working PC, it also failed to load the BIOS strip, only the fans (power unit/processor) were running. Effect of the running fans was manifesting in the power led & the CDROM led-they kept flickering.

What must have gone wrong my dear friends ?

Originally Posted by ocokdhogu

the processor labelled Intel Celeron 1200/256/100/1.5 (SL656) from the dead PC and replacing it with the one in the working PC whose actual processor is Intel Celeron 900/128/100/1.75 (SL5LX).

Let me start by saying I'm fairly out-of-date on my processors and what-not, so this opinion is probably not worth much.

That being said, you attempted to replace a 1.5 volt processor ( the last number ) with a 1.75 volt processor. I suspect that the voltage difference alone would likely ensure that the attempt to use the good processor in the dead PC would fail.

However, I am surprised that it might have damaged the good 1.75V processor. That being said, I'm guessing it's entirely possible that the motherboard was providing too much current to the processor ( let's say, for example, 2 volts ), and as a result it fried both the 1.5v original CPU and, when you put in the 1.75v CPU, did you the dubious favor of frying the new one as well.

However, it's very likely that my guesses could be wrong. Unless your BIOS allows you to change processor voltages ( some overclocking motherboards did, back in the day ), it's usually a good idea only to use CPUs with similar voltage requirements.