4600c Power Supply removal

exsecuritas

Have you tried pushing the Release Button down and then sliding the power supply back towards the front panel?

The Dimension 4600c Service Manual is HERE <ADMIN NOTE: Broken link has been removed from this post by Dell>

Bev.

Bev

brilliant. worked just like it was designed.

and extra thanks for the service manual link.

cheers

exsecuritas

exsecuritas

That's great, happy to hear it worked out as designed.   :emotion-21:   :emotion-11:

Bev.

I installed a new motherboard, reattached the various components, memory, drives.

very straight forward with the modular design.

now when I plug in power the system does not start.

1. the fan comes on and the aux pwr light on the board comes on so there is power to the board

2. on the front panel the power button is yellow and the drive indicator light is green

I don'rt seem to have the back panel diagnostic lights referenced in the service manual.

any ideas?

p.s. how did a gordie get to texas?

exsecuritas 

Is the power button LED solid amber, or blinking amber?

Are there any 'Beeps'?

A silly question, you have rechecked that all the power and data cables are properly connected?

Remove all the peripherals, except the monitor, keyboard and mouse and see if it makes any difference.

Bev.

Ps. 'how did a gordie get to texas?'.   Very carefully, way back in the swinging 60's.  LOL

Power button is solid amber

no beeps

i have re-seated and re-connected every cable. reinstalled the memory, reinstalled the fan and heat sink several times

i have attached power with no perpherals including monitor, keyboard and mouse.

and attached power with peripherals

checked for jumpers, power voltage, etc.

all with the same result.

(swinging 60's? like petula clark?)

exsecuritas 

Are any of the four diagnostic lights

<ADMIN NOTE: Broken link has been removed from this post by Dell>

on the back panel of the case lite?

A solid amber power button LED, could indicate a problem with either the processor and/or themotherboard.

Bev.

Ps. Yep and the Beatles before they copped out.

i don't seem to have any diag lights on the back panel

the motherboard is from AscendTech pulled Dell spare parts so who knows.

exsecuritas 

Try the following: 

Unplug the cord from the power supply, hold the power button in for about 15/20 seconds, open the case, unplug the 20-pin power connector from the motherboard and jump the Green wire to one of the Black wires, reconnect the power cord and power the system, if power supply's fan and the hard drive runs, then the PSU should be good.

Note: Do not remove any wires from the plug, use a small piece of wire or a paper clip as a jumper.

Note: The only 100% method of testing a PSU, is to install a know working power supply.

Power supply checks out and the system still does not work, again remove the power cord, hold the power button in for several seconds to discharge the residue power, reconnect the 20-pin connector to the motherboard.

Remove all the PCI cards, the video card [if applicable], memory, all peripherals, disconnect the data and power cables to all the drives, check that the front panel cable is connected to motherboard, with nothing else connected to the system, reconnect the power cable and power the system on.

If you do not get any beep codes and there is no change in the diagnostic lights, then it would appear that the motherboard has died.

Note: The processor could have failed, but the only method I know to check it, is to install it a compatible working PC, or use a know working processor. 

Bev.

i think i may have found a problem, if not the problem.

the microprocessor has some bent pins almost certainly due to my clumsy installation of the heat sink on top of it.

i haven't been able to find a replacement microprocessor yet in a quick internet search.

I may be out of luck.

If you're careful, you might be able to straighten out the pins and reuse your existing CPU.

exsecuritas 

That's a bummer.

Check out the 'Workaround' HERE for fixing bent processor pins, also the processor is 'Keyed' to fit into the socket only in one position.

See if you can locate a compatible Socket 478 processor HERE <ADMIN NOTE: Broken link has been removed from this post by Dell>

The 4600c support's Socket 478, P4 533/800 MHz FSB processors.

The early 4600c models will take up to 3.0GHz and the later models, to 3.2GHz or 3.4GHz.

Bev.

yes, I've been trying to satisfactorily straighten pins all morning (using my handcrafted multi-tool paper clip) to no avail. can I install any pentium 4 478  pin cpu? I can get a used 2.66GHz 400MHz 512KB on Amazon for about $11.

exsecuritas

Socket 478, 400MHz FSB processors are not supported.

Bev.

Bev

Thanks

I ordered a replacement processor from your recommended site.

I will continue to work on the pins in the mean time.

I guess that means I have too much time on my hands.

Do I need to use conductive adhesive?

Thanks again