Hello guys, I have this old PC, that does not start. Right now I have removed the dvd-reader and the hdd. I inserted an bootable USB-stick in one usb-port. Bur when I press the on switch this is what happens: https://drive.google.com/file/d/1u3jWwna6IB09psBLFOT1Bm-u8OaRpPH3/view?usp=drivesdk I thought that I would be abled to enter bios, but the machine turns off right away. The bootable USB-stick blinks, but the keyboard does not.
Hello, I removed the battery and then the keyboard blinked and the computer responded to my stroke. How ever it turned off right away. Tomorrow I will try to find a new battery and see what happens next. Best regards Fredrik
Today I changed the battery, I have to admitt that the replacement battery was not brand new but my volt meter measured it to 3.3 V. The old one measured just 2.6 V. But no progress. I also removed my usb keyboard and inserted a ps2 mouse and keyboard. The keyboard responded to my inputs. I mange to enter the BIOS, but just for a second before the computer shuts down. So it seems like there is something else that might be wrong.
I also tried to remove half of the RAM, and change place of them systematically. So if you guys got any ideas please let me know. Best regards Fredrik
Hello Ink, Thanks for your reply. Right now the problem is that I can not enter the BIOS, the computer shuts of before I can do anything, really strange. Best regards Fredrik
If I just push it once, the computer starts and then after like 30 seconds the computer turns off. If I hold it in the pressed state the same happens.
Could it be that this button is designed to just send a signal? Like given the computer is in a turned-off state, pushed once (or hold in pressed) it just sends a signal to the motherboard to start. Once released it is intended to "not send the signal any more".
It might be designed to just send a signal sInce it is common computers that are turned on, you could reboot it if you hold it pressed for like five seconds.
Or could it be that the button should stay in "on" state when pushed?
What do you think guys, if I cut the cord a bit down (so I can splice it back) and just connect the two wires and connect the computer to the wall socket and see what happens? (It might be the same as when I hold the button pressed I think.)
Hello guys, I managed to shortsen the two pins. How ever the computer shuts down again after a few seconds. So it does not looks like the button is the error source. I will now try to unmount the psu and see if I can see if it might be the error source. Any ideas are very welcome! Best regards Fredrik
Hello, I am from Sweden, I have to admit that sometimes I do not understand danish. So I prefer english. But I must say that eksperten.dk is the far best IT forum I have ever found on the net. 1-0 to Denmark. Best regards Fredrik
Well, I still remember Ole Madsen's goal against Sweden 20. juni 1965 in a soccer match. So, can we make it 2-0? :-)
Getting back to your problem. You never (as far as I can see) gave us the make and model number of your motherboard. Your picture in your original question doesn't have enough resolution to show it..
You call it an "old" computer. Again, as far as I can see, you never mentioned the operating system of your computer or the age of it. Was the operating system upgraded? Information about that might give us a clue.
Unfortunately I do not think they mention any spec of the motherboard.
I also might need to point out during these tests that I have removed the hdd. Correct me if I am wrong but I should be able to enter BIOS even there is no hdd connected, right?
Hello guys, Tonight I managed to check the pins from the PSU. I used this chart as a reference: https://images.app.goo.gl/7iqG55yT372zRGKS9 Unfortunately, all the pins were correct. Except pin 20, in my PSU I just do not have a cable to it, the hole is empty, no pin, no nothing. But I guess it should be like that.
So far everything looks like there is something wrong with the motherboard or the CPU attached to it.
Any ideas or suggestions are very welcome. Best regards Fredrik
Hello again guys, I see that the cooler fins above the cpu is pretty dusty. How would you guess I unmount the dan above the CPU? https://drive.google.com/file/d/1vdC8csLQ2jNX5yzdfFwq-FwZP25mupv_/view?usp=drivesdk I noticed that the screws just go round and round, do need to unmount the whole motherboard perhaps? Best regards Fredrik
Hello, Thanks for the reply, this PSU do not have any switch for switching between 110V - 230V so I guess it must be set for ~230V that we use in Sweden.
Tonight I will try to remove the motherboard and clean the cooler fins. I got a hunch that in fact might be an overheating problem. When I start the computer for the first time it will take like 40 sec before it shuts down. After a couple of repeats, that time has sunk to just 30 sec.
I will be back with news amigos! Best regards Fredrik
Hello, Thanks for your reply. There is a link to a picture of the motherboard in the tread start. Tonight I will try to manage better pictures. Best regards Fredrik
Hello, No problem, yes I have tried that but as soon I am getting into bios the computer dies. So I do not mange to do that. It is matter of seconds from start before it dies. Did you see the movie in the beginning of the thread? Best regards Fredrik
For your own "fun" it can be nice to go on checking out but i would have replaced the MB from stock or ebay (where you can find a LGA775 board for les than 200 DDK)
But some last tries : Have you removed all connections from MB (front usb/cardreader/sound) ? Check all Capacitors , that they do NOT have a tiny bump but are flat at the top !
In #22 you write: "When I start the computer for the first time it will take like 40 sec before it shuts down. After a couple of repeats, that time has sunk to just 30 sec."
That, to me, indicates a heat problem. Had it been one or two seconds, it could be a hardware problem. As you describe it there, I doubt very much that the PSU or motherboard are faulty.
You should be able to remove the cooler fan by just unscrewing the four visible screws at the top of it. They may feel a bit "spongy", but try to continue. Unscrew each screw 3-4 complete turns at a time.
A closer look at your picture in your question reveals that the motherboard probably is an ECS MCP73VT-PM Socket LGA775 mATX. And a closer look at it also reveals a lot of gunk in the cooling fins underneath the fans. If you have a vacuum cleaner, use it with care just above the fan while blocking the fans from spinning with a pen or something similar.
Hello guys, Yesterday I got occupied we some stuff, but Tonight I managed to take it apart. I cleand the motherboard easy ang gentle with a vacumcleaner. I also removed the fan and vent it through with air preasure. Alot if dust come off.
There is a short BEEP from the BIOS at around 9 seconds in your video. With an AMI BIOS that means a fault with the RAM according to this site: https://www.computerhope.com/beep.htm
Test your RAM-blocks with only one at a time in the first slot to see if that makes a difference.
Try also to set the correct time in BIOS. Turn off the computer and wait one minute. Turn it on again and see if has retained the correct time. If not, the battery is bad.
Hello, I have tried several attempts, with different RAM in different slits. How ever, one attempt, that I could not repeat unfortenately, I could enter the BIOS and set time and date. But the date did not remain until next time I managed to enter bios for a couple of sec. The battery gives 3.27V so I guess it is ok. How ever there was a smell of burn electricity, so I guess this is a over heating problem. But what do you think May it be a motherboard issue or a cpu issue? Best regards.
If everything has failed so far, it may be hardware damage. Before you buy a new motherboard or recycle the machine, have a professional check it out to be sure.
But #28 gives a hint of a cheap MB solution, so maybee You go on :-)
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