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PC will not boot

Here's the story, my friends computer needed some more memory and her current CD-rw wasnt working, her computer had been working absolutely fine until a new stick of RAM was put in and a straight forward swop of her old CD-rw for a new one.  When the power was turned back on and tried to boot up there where no beep codes and there was a message on monitor saying "no signal input" so I put her old CD-rw back in and took out the new stick of RAM, when i tried to boot again with the computer being back to its original state (when it worked fine) got the same message on monitor, so took it to a shop and they took off all drives, and took out memory and still no beeps or anything, any ideas as to what has happened here?? thnx
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keepa
Asked:
keepa
1 Solution
 
LucFCommented:
Hi keepa,

Did you disconnect the main power before fiddling inside the computer as just turning it off isn't enough.
You might have shorted something.

Greetings,

LucF
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CallandorCommented:
It might be a case of static electricity zapping a chip on the motherboard - very common in dry air (cold weather) and carpeted floors.
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keepaAuthor Commented:
yep unplug everything before i put new ram and cd-rw in, oh no hope it hasnt shorted something as its her work computer :-(
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LucFCommented:
Try stripping down the system to it's bare minimum, only PSU, CPU, motherboard.
It should start beeping right away.

If it does, start adding the memmory, then the videocard. After each time check if it still boots.
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keepaAuthor Commented:
ok will try that thnx lucf, will get back to you when done :-)
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LucFCommented:
Good luck :)
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compfixer101Commented:
if you have an at PSU you might have put the plugs in the mobo wrong they should always be BLACK to BLACK if not you couldhave totally shorted the MOBO check it out


:) :):):):): ):):)   :                       )                       :-----------------------------------)))
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keepaAuthor Commented:
Here's the latest... took computer to a friend who knows a little ( a lot lol) more than me, he tried harddrive, cd-rom, the new cd-rw in his machine and they worked fine, so he reset the cmos and put everything back into the computer except the new and old ram stick, he put one of his ram sticks into the computer, and hey presto machine booted up and all is ok, but what we cant figure out is why the original ram stick was ok, before i put the new stick of ram in, and now the original ram doesnt work?
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LucFCommented:
Wow! That's some good news ;-)

I'm wondering how adding a stick of memmory can ruin another one though...
At least don't use these sticks of memmory anymore (you probably figured that out allready)
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LucFCommented:
ThanQ
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