Power-connection problem

S

Sari95

New Member
Hi! Today I decided to open my desktop computer and clean it for all dust inside. However, as stupid as I was, I forgot to mark which wire goes where, which resulted in problems. I put the computer back together and was confronted with a power problem, where the computer does not turn on. I tried disassembling and reassembling it several times, without any luck. I believe that the main issue is a wire I cannot find any connection for, which I also believe has something to do with power. The desktop is a Fujitsu Siemens Scaleo H bought in 2007.
This is the wire:
http://www.2shared.com/photo/2LfD78So/2012-04-07_160635.html
http://www.2shared.com/photo/k80SX4am/2012-04-07_160626.html

Thanks in advance for all help!

Regards, Sari
 
Last edited by a moderator:
That would be the power connector that goes to a dedicated video card if you have one.
 
Can't see your pictures but did you remember to plug in the 4-pin power connector which plugs in near the CPU (typically near the top left hand corner of the motherboard)?
 
is there no spare slot for that one cable to go in? It would just be obvious to look for the slot it would go into?
 
Sari95 said:
Hi! Today I decided to open my desktop computer and clean it for all dust inside. However, as stupid as I was, I forgot to mark which wire goes where, which resulted in problems. I put the computer back together and was confronted with a power problem, where the computer does not turn on. I tried disassembling and reassembling it several times, without any luck. I believe that the main issue is a wire I cannot find any connection for, which I also believe has something to do with power. The desktop is a Fujitsu Siemens Scaleo H bought in 2007.
This is the wire:
http://www.2shared.com/photo/2LfD78So/2012-04-07_160635.html
http://www.2shared.com/photo/k80SX4am/2012-04-07_160626.html

Thanks in advance for all help!

Regards, Sari
Click to expand...

That is a new cable to me! Can we have a picture of your MOBO?
 
WinDOS said:
That is a new cable to me! Can we have a picture of your MOBO?
Click to expand...

As John said, it's a 6-pin GPU power cable. Unless you have a higher end video card you don't need to plug in that power cable.
 
It's a 6-pin PCI Express connector as John and Voyager said.

Yes you only need to install the 6-pin PCI Express power cable if you have a graphics card in your system which uses one (most mid- to high-end cards do), if not, then the cable does not need to be used. But you said your system wasn't starting up, so I'm going to assume that you have a dedicated card which you need to plug the cable into. That, or you've missed something else such as the CPU power, or maybe you didn't plug the 24-pin power cable well enough, or you shorted something like the motherboard out whilst you were doing work on the PC. Did you ground yourself before you did the job?
 
I've tried looking for a fitting slot, but found non. Vista, uhm, ground myself? What does that mean?
 
It means make yourself safe to touch computer components, you should not do anything with your pc unless you know that basic rule! toch anything metal ( i touch the case). Bad news is you could have shorted the Mobo out :/ is there a green L.E.D on the mobo when power is conencted if so it should be ok if not idk.
 
Sari95 said:
Vista, uhm, ground myself? What does that mean?
Click to expand...
You ground yourself to prevent ESD (electrostatic discharge) build-up when working on sensitive components such as computers. ESD can wreck components, I've destroyed several sticks of RAM and some graphics cards over the years thanks to ESD. You should be OK and you shouldn't have shorted out anything so long as you didn't move around too much or directly touch the motherboard or anything like that whilst working on the machine.

Is there anything else that is not connected? If the computer has a floppy drive, disconnect it and see if it boots up then. Floppy drives often used to cause problems and sometimes prevent PCs from booting if pins were bent I found.
 
All right, hmm... If you'd want to check what's wrong with the computer. How would you do the troubleshooting? Could you possibly make a list for that :)?
 
This is what I'd do in this order: (try to boot the PC after you've done each one)

Firstly check to see the motherboard if power by looking for LEDs on the board, they should be on if the PC is plugged into power, even if the PC is not actually running. If no LEDs show when the PC is plugged into power and turned on at the wall on PSU, chances are the motherboard is dead.

1 - Check to see if the switch on the back of the power supply is switched OFF. If it is, turn it ON, hey presto, PC works! (this nearly ALWAYS gets me!!)

2 - Check to see if you have accidentally dislodged or forgotten to plug in your power switch wires into the motherboard! It's the simple things to look for first!

3 - Failing that, check to make sure everything is plugged in. Check 24-pin motherboard power and 4-pin/8-pin (depending on PSU and motherboard) CPU power connector especially. Also check 6-pin PCI express on graphics card if there is one

4 - If there is a floppy drive, remove it or unplug it.

5 - Start removing or reseating any extra PCI expansion cards such as modems, additional USB card, sound cards etc etc. Remove one by one and test to see if the PC will boot after you have removed. Eg - remove sound card, see if the PC boots, if it doesn't, remove modem, see if the PC boot etc etc.

6 - Start reseating or removing RAM sticks or try RAM in different combinations/bays.

7 - Remove or reseat any dedicated graphics cards and see if the PC will boot using the onboard video if the motherboard and CPU support it. If not, remove the graphics card, install it temporarily in a known working PC, and see if the PC boots with it installed. If it doesn't boot with the card installed, there's your problem.

8 - Remove the CMOS battery and reinstall it a minute or two after you have removed it

9 - Try another known working power supply or remove the power supply installed in your system and try it in another known working system and see if you get the same problem.

You must make sure you ground yourself before doing any of this stuff. Plug the PC into power, make sure the power is turned on at the wall, touch a part of the case that is bare metal (a screw usually works) and then you are done. Try not to move around too much as you will build up charge again. To ground yourself again, just touch the same screw or bare metal part of the chassis you touched before.
 
All right, so thanks to vista's awesome instructions I managed to get the machine working again :D However, when I start the computer, I get this message: BOOTMGR is missing. What is this and how do I solve this? :)
 
Check that your hard drive is set as the first boot device in the BIOS.
 
Sari95 said:
All right, so thanks to vista's awesome instructions I managed to get the machine working again :D
Click to expand...
So pleased you at least got the PC to POST, what did you do to get it going?

Sari95 said:
However, when I start the computer, I get this message: BOOTMGR is missing. What is this and how do I solve this?
Click to expand...
Yes you need to make sure the boot priority is (CD ROM) -> Boot hard drive -> anything else. I put CD-ROM in brackets because it's not essential that it's your first boot device but it can be handy. If you have multiple hard drives in your system, the one with Windows or the OS you are using installed on it needs to be the first boot device.
 
Last edited:
Hahah, I made an unbelievably stupid mistake xD The 24-pin power supply from the generator was not properly connected to the motherboard, thus no electricity :S

Sorry for the late answer btw, but I became so happy when the computer began working again that I totally forgot to thank you guys xD

Thanks everyone, especially you vista!! :D
 
You must log in or register to reply here.
Back
Top