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Random shutdown after replacing pump?

G

Grady

Weaksauce
Joined
Nov 14, 2007
Messages
70
About 2 months ago the water pump in my PC died so I just got around to ordering a new one.

I ordered the same exact pump as I had - Swiftech MCP655-B. I also got some new tubing, as the tubes I had were foggy and such.

I spent all day today installing my new pump and doing some much needed wire management on my PC. I finally got it all done. I plug in all my stuff (monitors, keyboard, mouse, speakers) and my PC now just randomly shuts itself down. It will start itself back up after about 5 seconds. This never happened before.

When this initially began, I thought maybe it was my temperatures. That wasn't it. My temps are just as they were with my old pump. Idling at 32C and that's OC'd to 3.7ghz. I took this out of the equation by resetting my BIOS back to default which was 3.0ghz. After doing this, I managed to get into Windows (XP Pro) for roughly 30 minutes before it just shutdown again and then restarted itself. It's done this several times and occasionally will get stuck in a restart loop where it will reboot itself 3-4 times in a row before finally staying on (which is only for a few minutes anyway)...

I can't think of what would be causing this. None of the PC critical hardware changed. The only piece of hardware that was altered was the water pump. That's it. And this never happened before.

Any ideas fellas? This is really frustrating. I spent all day cleaning my watercooling parts so I could essentially start anew with this pump but this issue is REALLY pissing me off.

I may try reseating the RAM, but other than that...can you guys think of what would be causing these random restarts?

Any and all help will be very much appreciated.

Thanks.
 
Reseated RAM and to no avail...the computer rebooted itself 3 times in an immediate row on loading into windows.
 
all i can do is guess.

pump - unlikely but it could be possible that it is defective and drawing too much current overloading the power supply causing the supply to overcurrent or overvoltage trip. One thing to try is to set stock or under clocked settings and try and run the machine for a while with the pump off/disconnected. It should run quite a while before temps get alarming just due to water in the block. But keep a close eye on temps.

Wiring, I suspect this more, something loose or missed (4 pin aux 12v for cpu ? ) when you did the wire cleanup.

Software, somehow windows got corrupted. Try download and burn (if you can get it to stay up long enough) a memtest86+ cd and boot from it and see how long it will run before trouble happens.

If you happen to have a DC voltmeter it might be interesting to plug it into the yellow (12V postive) and black (neg) of a spare 4 pin molex connector of the power supply and then watch what the voltage does when you plug in the pump and let it run a bit. There should be some jumping around of the voltage when you first plug in the pump but it should stabalize back to near normal (whatever voltage is with pump disconnected) voltages pretty quickly and vary only very slighlty once the pump starts running.

Thats all I got.
 
Well, I downloaded and burned Memtest86+ on the laptop here. It ran just fine for 25 minutes and passed 100% through 1 full pass. No errors were reported.

Also, one other thing I noticed; I could sit in the BIOS all day long and the PC won't reboot or shutdown.

I'm going to let another pass go on Memtest before I stop it just to make sure.

What does it say that I'm able to sit in the BIOS and Memtest for any amount of time I choose but any other way - and it's shutdown, reboot, shutdown, reboot, shutdown, etc...all on it's own?

I guess that rules out RAM (mostly) and the PSU, right?


EDIT: After several RAM tests using Memtest86+ the PC has been up and running within the Memtest program for over 45 minutes now. This is the longest it's been on without interruption.
 
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Have you tried chkdsk? Starting to sound like a hard drive or software problem.
 
I think so too, pointing more to sw.

If XP boot from the original install disk and do a "repair" install. Proceed just as if you where going to install windows for the first time, tell it to use existing partitions. the installer will come back and say "you appear to already have windows installed, do you want to repair it ?". Say yes to this, it will restore critical windows files but leave all your apps and data alone. Fixes a world of hurt. Might be slow starting up for a few times afterward but will quickly be good as new. chkdsk is a great idea too.
 
After the RAM test last night I posted I decided to do an OS HDD test using the Seagate HDD tester in Hirens 10.0. This took a while but came back and passed on a long test. I then had the idea to do a repair of Windows XP (which apparently you both had the same idea!) because it was the only thing left. I had tested every other item that could have been generating those types of errors.

During the repair, I was getting so worried that if that didn't fix it, the issue may be my motherboard was failing. Luckily, this doesn't seem to be the case.

Everything "appears" to be in working order. Although, I'm a bit apprehensive to reboot though.

Thank you Bill and baker for your help and suggestions!
 
Ouch. k will think some more. Kinda leaning towards pump now as you likely gone over the wiring.
 
Yeah, I rewired my radiator fans a bit and took out some unnecessary connectors I found. I don't get it though. It ran all night, no issues until I shut it down this morning (for the fan rewire).

I don't think I could run it long enough to test with the pump off before the temps got too high. I've seen them climb in the BIOS without the pump. It gets hot quick.

One thing is still constant though; I can sit in the BIOS all day long and it won't shutdown.

I'll try moving the pump to another 4pin connector. Maybe there's a short in the one it's connected too?

EDIT: That didn't work. It constantly is recycling power. ON for 2 seconds, OFF for 2 seconds, ON for 2 seconds, OFF for 2 seconds and this keeps happening over and over. Could it still be the PSU? Even though it ran all night long? I will say, the power supply is REALLY hot. Maybe I've just never touched it before after it's been on for 12 hours but it's REALLY hot.
 
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What motherboard ?? Gigabyte ??? IF so do a full cmos reset. If you can go into bios and reload factory defaults, exit and save, turn off. Then unplug AC from wall (critical) . Remove cmos battery, put on clr cmos jumper, go watch a tv show or better yet leave overnight. After at least an hour, pull jumper, replace battery, plug in. Boot and go into bios and load factory defaults then just put in absolutely necessary settings, no OC, set your memory voltage should be about all you need to do. Reboot and see how it behaves now. Dont mess with anything in the bios until the rebooting issues go away.


hmmm saw the constant reboot and kinda stopped reading as that is the "dumb gigabyte syndrome" which is common. Whet back and yeah I am with baker269, dont care how long its been on, the power supply should not be "really" hot. Nice and warm OK, almost hot - OK. really hot NOT OK.

Give us your system speces. Or just beg/borrow a more powerful supply and or unhook all unneeded devices, just cpu/motherboard/memory/video/keyboard and pump. This all started with the pump and the rewire. Something is shorted is my best guess. What pump and does the motor housing get hot ? warm ? How fast ?

If you stick your finger tip on the pump motor and also try the power supply case, how many "mississippi's" can you count before you have to get your finger off ? one mississippi, two mississippi, ...

Sorry - something has gone south in a hurry. Still on the pump and wiring as that is all you messed with and if that power supply is running much hotter than before the changes I just keep coming back to a wiring error (unlikely as it is hard due to connectors preventing something getting plugged into the wrong place) or that pump motor has a short in a winding. Still not much help .
 
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Sorry for the delay in response guys. It turns out it was the PSU. I went to a local Staples and bought the largest PSU they had (750W) which is 50W more than the one I had. I put it in, and no more issues.

I've been able to reboot and shutdown multiple times in the past day or so and it seems to be stable.
 
Glad you got it fixed. One thing tho, a quality power supply can be your best friend and a cheap one your worst enemy, especially when overclocking.
 
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