Help please, I upgraded an old cpu heatsink, and now the computer does not boot! :(

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Lordofthepies

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Jul 25, 2013
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I installed a Cooler Master Hyper 212 Evo, replacing the stock cooler, and now the computer will not boot! The led's turn on, the HDD light stays red though, the disk drive will open and close, the fans all spin, but nothing appears on the monitor. :( I did have to take the mother board out completely to install the back-plate/sheild thingy, and I had to put it all back in, and plug the connections back in too. I was working on carpet. HELP ME PLEASE! Any feedback appreciated!
 
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nostall

nostall

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Before I start, don't work on carpet. Easy static electriciy build up and that will fry things.
1st, Check to be sure all the RAM is installed properly and seated all the way. Make sure the main mobo power cord is plugged in all the way. Make sure you plugged the auxillary power (12V) into the video card (If so equipped).
2nd, check to see that you plugged in the EATX 4 or 8 pin auxillary power all the way.
Probably before all of this, make sure that nothing on the bottom of the mobo is touching anything in the case
except for the stand-offs.
3rd. If that doesn't work: Did you pull out the CPU to clean it or whatever? If so, check to be sure that you didn't bend or break
any pins when you reinserted it and/or that it is inserted correctly.
Here's a Tom's link to other step to take if these don'e rectify the problem.
Post back and let us know how it's going, please.
 
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ur6beersaway

ur6beersaway

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Apr 18, 2013
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I hope its works, I've opened my rig for "heart surgery" every now & then, it is easy to miss something.
 
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Lordofthepies

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The led on the case, is red. <--(the one that blinks when the HDD is reading or writing) It stays that way. Does not blink, does nothing, its just red. There is one light on the mobo, it's green, and I do not know what it stands for. I don't remember if there were any other lights on the mobo either. Is there any way to tell if the mobo is bad?
 
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Lordofthepies

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Well, thanks for posting, and I am pretty sure the RAM was properly seated, it is an old rig, and it came with only one dim of RAM. There are 4 slots for the RAM though, how do I know which one to put the RAM in? Is the 4/8 pin auxillary power cable/block you're talking about the cpu power? If so, I am pretty sure that it is plugged in all the way, too late to check now. I will do so tomorrow. I am not sure once again about the standoffs, but the sheild/backplate that is needed to mount the heatsink is touching the case, I believe. Would that short the mobo? I did pull out the cpu to clean some cpu paste off of it, I will go back and check the pins tomorrow.
 
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Lordofthepies

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It is a very old mobo, Intel. I am not sure if this is it, there is the number D945GTP D945PLM in the mobo, the closest I could find to that is this---->http://www.intel.com/support/motherboards/desktop/d945gtp/sb/CS-029368.htm?wapkw=d945gtp
 
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Lordofthepies

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I am pretty sure something is not connected properly, because everything seems to be working properly, the lights, exept the hdd one, the disk drive opens and closes, there's a green light on the mobo. (I don't know what it stands for.)
Yes, it did work before, with the stock cooler, I took it apart today to put a new heatsink on, since the stock cooler isn't the best, (I took the mobo out of the computer, with everything unplugged, put the backplate on, then put the mobo back in the computer, attached all the cables, (probably did something wrong here) and the fans all spin up, lights work, but nothing on the monitor. So, now it does not work. :( When taking the big power block out of the mobo, it was very very hard, I had to pull extremely hard, and then it came out. Could that be part of the problem?
 
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Lordofthepies

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Jul 25, 2013
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I will be using this list tomorrow, looks very helpful. Thanks for the link!
 
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nostall

nostall

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Nov 28, 2012
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Lordofthepies said:nostall said:Before I start, don't work on carpet. Easy static electriciy build up and that will fry things.
1st, Check to be sure all the RAM is installed properly and seated all the way. Make sure the main mobo power cord is plugged in all the way. Make sure you plugged the auxillary power (12V) into the video card (If so equipped).
2nd, check to see that you plugged in the EATX 4 or 8 pin auxillary power all the way.
Probably before all of this, make sure that nothing on the bottom of the mobo is touching anything in the case
except for the stand-offs.
3rd. If that doesn't work: Did you pull out the CPU to clean it or whatever? If so, check to be sure that you didn't bend or break
any pins when you reinserted it and/or that it is inserted correctly.
Here's a Tom's link to other step to take if these don'e rectify the problem.
Post back and let us know how it's going, please.

Well, thanks for posting, and I am pretty sure the RAM was properly seated, it is an old rig, and it came with only one dim of RAM. There are 4 slots for the RAM though, how do I know which one to put the RAM in? Is the 4/8 pin auxillary power cable/block you're talking about the cpu power? If so, I am pretty sure that it is plugged in all the way, too late to check now. I will do so tomorrow. I am not sure once again about the standoffs, but the sheild/backplate that is needed to mount the heatsink is touching the case, I believe. Would that short the mobo? I did pull out the cpu to clean some cpu paste off of it, I will go back and check the pins tomorrow.

I think you have noted the actual problem. If that backing plate is metal and is touching the case, then you have probably shorted out the board, and of course it ain't goin' to boot.
You will have to correct that somehow. Perhaps, unfortunately, you may have to return to the original heat sink&fan..
Still check the CPU, and be sure you clean it and the heat sink thoroughly with (preferably) 99% alcohol (you can also use regular rubbing alcohol or even non-chlorinated brake cleaner) and REPLACE the thermal compound with new compound. Usual method is to place a small amound, about the size of a BB or small grain of rice, in the middle of the CPU heat cover (the square metal plate on the CPU), then reattach the heat sink.
The green light on the mobo usually indicates that the mobo is getting electricity.
If the red light for the HDD used to bliink (indicating that the HDD was working),and is now solid, there are two possibilities: First is that the HDD is spinning and working trying to load/find/read/write information, or the short to the case is lighting it up.
 
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