Compaq Pressario 7464 - powerswitch problem

[komputerdk]

Hi

I have upgraded my girlfriend's old Compaq Pressario 7464 (AMD K6-2 500Mhz) to an Albatron KM18GPro2 / Athlon XP1700+. Since my mATX case was really crappy I installed the Albatron board in her compaq case and then the wierd things happened:

1) USB connectors pins do not match the KM18GPro => I modified the case with a USB brancket I had.
2) The really wierd part: The connectors for powerLED/HDLED and powerswitch was to gether -> I used a knife to seperate them BUT the computer will not turn on if the print where the powerbutton are is touching the case (So I isolated it with tape , and powerLED/HDled is disconnected)

So Now I will installe the old Compaq motherboard in my mATX case , but I have tried to connect the powerswitch to the motherboard and nothing happens happen when I want to turn the computer on (the case and motherboard worked before I made the upgrade).

So what to do ?? do Compaqs have any special connection for powerswitch (due to my problem 2, I guess that could be the case?)

thx in advanced

 

[Rugger]

In old Dells the power supply cabling was wired in a non-standard config - it would only work with a Dell mobo. A lot of the major OEMs traditionally used proprietary configs to force consumers to upgrade with their (more expensive) parts. If this is the case with your g/f system, then don't plug the power back into that system. Call Compaq with the model number of her old system to see if that is the case.

Other possible probs:
1. The mobo is grounded - check to make sure there are no extra mounting stanchions installed. You can also take the mobo out (only cpu, memory and gpu installed) and put it on a non-conductive surface and try again.
2. You installed a bad mobo.
3. Bad PSU or the PSU is not powerful enough for the new parts.

Check these and let us know your results.

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<font color=red>You're a boil on the arse of progress - don't make me squeeze you!</font color=red>

 

[komputerdk]

well when I decided to unplug the motherboard - I looked at the org. powersupply from the Compaq (I changed that too, since a 200w isn't great for a XP1700+) - It seems that my mATX powerSupply is missing a pin in the 20pins ATX powerplug.. the PWR_OK (pin8) is missing, and when I tried to use the powersupply from the Compaq it worked fine..

So my next question is - what does PWR_OK do? and how can I make a "fake" PWR_OK pin (my psu is a SFX type)

<P ID="edit"><FONT SIZE=-1><EM>Edited by komputerdk on 07/20/05 01:18 PM.</EM></FONT></P>

 

[Rugger]

Looks like option 3 was it. No idea on how to make a power_OK pin. I personally wouldn't mess with it. I say RMA and ge a good PSU.

__________________________________________________
<font color=red>You're a boil on the arse of progress - don't make me squeeze you!</font color=red>

 

[komputerdk]

well it is my PC nr. 3 - so it was primary as loan Office PC with an USB bootdrive or Knoppix CD.. but I had wrote the reseller to hear them ..

anyway THANX alot for your quick response!

 

[Rugger]

You should be able to get a 300W PSU for pretty cheap - look at a Sparkle or Fortron.

Always glad to help!

__________________________________________________
<font color=red>You're a boil on the arse of progress - don't make me squeeze you!</font color=red>

 

[gwave65]

Be careful when swapping parts with proprietary systems. Many of the parts in Compaq including power supplies, connectors and pin connectors are proprietary and will not work with standard ATX equipment.