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View Full Version : [ubuntu] Computer turns on and off, wont load OS



Crazy K
February 21st, 2012, 11:02 PM
So I'm having an odd problem. I was playing online (xbox 360) when I noticed my computer just shut down. I thought it was just nothing so I let it restart. Well it seemed to be fine and I kept on gaming. But when I went to go on the computer, I noticed that my mouse wasn't lighting up, but my tower was. I tried to restart it, but nothing. The light on my tower would light up and I can barely hear a noise from my tower. I checked the power supply and the fan in it is going extremely slow.

Well now I can't even keep it on. It keeps shutting off and on.

I checked to see if the motherboard was the problem by taking out the RAM, but it beeped when it started up, so that is not the problem.

Could it be my power supply? I noticed that the green light was on, but the fan is barely moving when the other fans in the PC seem to be going a bit faster. There's power going through it because it turns my External HD on along with my mouse.

But it doesn't really go through to the monitor at all. It's as if the HD isn't working right.

Anyways here's some spec info that I could get:

2.9GB of RAM or so
DVD writable drive
Ubuntu 10.04 Lucid Lynx

Type of computer:

Lenovo think centre A55
MT - M: 9265-KQU
S/N: LKNRPX4

Power Supply info:
LITE ON
FRV P/N: 41N3479
Lenovo Part #: L1 or LI not sure: 41n3480 LC: 36001004
Model # PS-5281-7VW ROHS
EC-level-J83931

Thanks for any help guys. I really appreciate it. I had plans to get back into my online work, if I can't fix this soon I may lose that chance.

What I want to know if it's the power supply? Should I buy a new one or what?

Crazy K
February 21st, 2012, 11:05 PM
Also I heard if you disconnect stuff from the motherboard, like the RAM, that it will beep, and if it does that, it isn't the motherboard. Is this true?

And I understand this isn't really a Linux problem, but still, I can't seem to find help elsewhere.

trundlenut
February 22nd, 2012, 01:26 PM
The power supply does sound dodgy. The easiest thing would be to try another power supply. Do you have another machine you could swap the power supply from or borrow one from a friend. I have four or five spares knocking around but not much use to you.

roelforg
February 22nd, 2012, 01:28 PM
The power supply does sound dodgy. The easiest thing would be to try another power supply. Do you have another machine you could swap the power supply from or borrow one from a friend. I have four or five spares knocking around but not much use to you.
Do it as fast as you can!
I once waited and the PSU came down HARD (sparks, smoke, the whole shebang),
Fried mobo,mem,CD-drive...
Strange enough, the HD survived and worked fine, inserted in another pc and it just booted??? Those things are tough!

alhera
February 22nd, 2012, 04:14 PM
You can check the power supply. Probably your problem is there. So all you need to check the power supply properly.

Crazy K
February 28th, 2012, 12:54 AM
Hey guys, bought a new PSU and it's still doing the same thing. So it wasn't that. Not sure what it could be because I don't think it's the HD or anything else. As I said before, I took the RAM out and it beeped and all that, so the motherboard should be fine.

Anything I can do to tell what the problem is? I got the thing to go faster by hitting the fan on the processor, but the problem continued.

But yeah, I might just have to get a new PC and I really doubt I can do that. I could use all the help I need with this.

The PC just keeps restarting, and all of the fans seem to run slower than normal. Even with the new PSU in it does that (returning it now).

hildenbrandsteven
February 28th, 2012, 01:57 AM
It's still possible that there is a memory issue even if it beeped, try starting the system after removing one of the memory sticks... then try the other one, etc.

Crazy K
February 28th, 2012, 02:15 AM
I have a feeling it's the processor that's causing problems. I don't know a whole lot about the insides of a PC. But I looked some info up and it could very well be the processor and the thermal paste not cooling it down enough. I read a bit of info on it that this could force your PC to re-boot constantly because there's a precautionary measure introduced when an overheating problem occurs.

Think it's worth a shot trying? I checked the processor and there didn't look to be a lot of thermal paste.

Crazy K
February 28th, 2012, 02:22 AM
It's still possible that there is a memory issue even if it beeped, try starting the system after removing one of the memory sticks... then try the other one, etc.

I tried them both separately. And the same thing happened.

Crazy K
February 28th, 2012, 02:29 AM
I just rechecked the thermal paste. Is it supposed to be dry? I have no idea if it should be greasy, or dry. But from the looks of it, it's quite dry. And I felt it too and it does feel dry.

Could this be the problem?

LinuxFan999
February 28th, 2012, 03:20 AM
I just rechecked the thermal paste. Is it supposed to be dry? I have no idea if it should be greasy, or dry. But from the looks of it, it's quite dry. And I felt it too and it does feel dry.

Could this be the problem?
I think it would be a good idea to apply new thermal paste.

Crazy K
February 28th, 2012, 03:48 AM
Would any thermal paste be good for the job? I found one on buy.com here for $6 or so in total. Here it is: http://www.buy.com/pr/product.aspx?sku=10311463&sellerid=31064376

Crazy K
February 28th, 2012, 03:12 PM
Actually I hear this AS5 thermal paste is better (Arctic Silver 5): http://www.buy.com/pr/product.aspx?sku=202847867&sellerid=12969742

Might as well just get that instead. Should I?

trundlenut
February 28th, 2012, 05:01 PM
Unless you are looking at overclocking I would just get some cheap paste. You only need a small amount.

Does the machine misbehave even when you first turn it on? I would have thought that if it was an overheatin problem this would only happen after a while once it has actually heated up.

Dlambert
February 28th, 2012, 05:04 PM
I would but anything till you know the exact problem. AS5 is great though.

Gremlinzzz
February 28th, 2012, 05:20 PM
Your not getting any beep codes?
Hardware Maintenance Manual
http://support.lenovo.com/en_US/detail.page?LegacyDocID=MIGR-65136

Crazy K
February 28th, 2012, 09:37 PM
I get beeps only when I remove the RAM. At first what happened was that my computer just shut off, it seemed to restart but I didn't pay attention to it further. I kept trying to restart it after the incident and it'd start up a bit but then shut down, actually no, it would stay on, but nothing would come up on the screen, but the monitor was working fine. After a while of that every time I connected the power cord it started on its own and it started going on and off. It goes for maybe 5 seconds than shuts off, then restarts.

And I'll probably go with some other thermal paste then. Maybe ceramic or something, that seems cheap enough.

And the beep codes, I don't get any unless RAM is out. The HD seems to click and spin a bit, but I can't figure much else out when it doesn't stay on long enough.

trundlenut
February 28th, 2012, 11:08 PM
If you have swapped the power supply and it still does it I would be suspecting the motherboard is at fault.

Crazy K
February 29th, 2012, 12:22 AM
How much would a motherboard cost me? I don't really want to get a new PC or buy a refurbished one.

I have a Lenovoa thincentre A55 9265 is the model # I believe.

Crazy K
February 29th, 2012, 06:21 AM
Unless you are looking at overclocking I would just get some cheap paste. You only need a small amount.

Does the machine misbehave even when you first turn it on? I would have thought that if it was an overheatin problem this would only happen after a while once it has actually heated up.

Once I connect the power cord it starts up, but shuts down right away, but it keeps restarting and shutting down. It does this until I unplug it.

I was told elsewhere to try resetting CMOS, but that didn't work. I even took the battery out, and replaced it with a new battery.

I noticed I was able to get my DVD drive to light up, but it wasn't for long. How would I check to see if it was a short on the motherboard?

I'm just thinking about purchasing this cheap computer and installed Ubuntu 10.04 on it: http://www.2computerdeals.com/item/computers-under-100/dell-optiplex-gx280-desktop-2-/lid=11754490

But I need to know if I can put my SATA HDD in there as well as my current writable DVD drive? I can't stand not having a DVD drive. haha!

I also have my eye on these other two towers:

http://www.2computerdeals.com/item/computer-tower-deals/dell-optiplex-745-tower-core-2/lid=25035086

http://www.2computerdeals.com/item/core-2-duo-computers-starting-/dell-745-ultra-sff-core-2-duo-/lid=20838036

I don't really need a computer for gaming. Just for general usage like surfing the web, listening to music, and watching videos.

LinuxFan999
February 29th, 2012, 03:32 PM
Once I connect the power cord it starts up, but shuts down right away, but it keeps restarting and shutting down. It does this until I unplug it.

I was told elsewhere to try resetting CMOS, but that didn't work. I even took the battery out, and replaced it with a new battery.

I noticed I was able to get my DVD drive to light up, but it wasn't for long. How would I check to see if it was a short on the motherboard?

I'm just thinking about purchasing this cheap computer and installed Ubuntu 10.04 on it: http://www.2computerdeals.com/item/computers-under-100/dell-optiplex-gx280-desktop-2-/lid=11754490

But I need to know if I can put my SATA HDD in there as well as my current writable DVD drive? I can't stand not having a DVD drive. haha!

I also have my eye on these other two towers:

http://www.2computerdeals.com/item/computer-tower-deals/dell-optiplex-745-tower-core-2/lid=25035086

http://www.2computerdeals.com/item/core-2-duo-computers-starting-/dell-745-ultra-sff-core-2-duo-/lid=20838036

I don't really need a computer for gaming. Just for general usage like surfing the web, listening to music, and watching videos.
I think the computer in link #1 is too old to support SATA. The computers in links 2 and 3 would be better.

Crazy K
February 29th, 2012, 05:29 PM
Alright. I'll look more into the other towers. Might just get the $199 one just to have the better model. Thanks for pointing it out though. :)