Use Standard ATX Power Supply with Compaq Mobo
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New member Username: MarimolPost Number: 1 Registered: Jul-05 | Hello All. I was searching on how to use a standard ATX power supply with a Compaq Motherboard because my Compaq's Power Supply just died; and I found this forum. I found some information in the following post: https://www.ecoustics.com/electronics/forum/computers/120374.html But it is still unclear to me on how to do it. I would like to use the 420W power supply that I have instead of the old 235W that my Compaq 5430US has. The atx power supply has a 20 pin conncetor and the Motherboard needs a 24 pin, so I bought an adapter but it doesn't work. Still no power gets to the motherboard. I know I have to re-arrange some cables from the power supply, but I don't know which ones. Can anyone please give me some instructions on how to make the new power supply work with the Motherboard? I really don't have money to buy a new motherboard and throw this one out the window; or get a new power supply from compaq, which is $95 Thank you very much. |
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New member Username: MarimolPost Number: 2 Registered: Jul-05 | I found the pinout for Compaq's 24 pin connector. Maybe someone in here will figure out how to mod an atx power supply to make it work with a Compaq motherboard. ftp://ftp.compaq.com/pub/supportinformation/techpubs/maintenance_guides/123385-0 03.pdf It's in page 61. |
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gdl Unregistered guest | Here is complete information for converter/adapter generic atx 20 pin for Compaq Deskpro EN Series... Note: Still some bugs, but work fine. Conversion Avanzada: Con esto se hace casi compatible una fuente generica 20 pin atx con una fuente propietaria compaq PIII, se corta el pin 8 PWROK, (cable gris) y se ponen en corto el pin 2 (3.3V cable naranja) con los pines 21, 22,(estos pines son los del lado derecho del conector y quedarian sin conectar) pero haciendo el corto con el pin 1 o 2 (3.3V) con esto se detecta la RED, y el sensor (temperatura). En Bios seleccionar "After Power Loss" Always ON. Bugs: 1.-Se tiene que apagar desde el switch de la fuente porque windows no la apaga automaticamente. Conversion Basica: Cortar el pin 8 PWROK (cable gris). dejar 4 pines restantes sin conectar. En Bios seleccionar "After Power Loss" Always ON. Bugs: 1.- Se tiene que apagar desde el switch de la fuente porque windows no la apaga automaticamente. 2.- No se detecta la tarjeta de Red, Ni el Sensor de temperatura. |
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New member Username: Maciejg7Post Number: 1 Registered: Oct-05 | Hi, I use Compaq Presario 6000 I live in Europe, so voltage is 230V But switch 230/115 was very interesting for my 2,5 years old son, so my Compaq now is dead  with some smoke I tried to install no name power supply (I knew i have to cut some bigger hole in compaq case), system started but coolers did not. No name supply has no P9 connector (white 2pin cable at compaq Power supply). I don't know if coolers don't work cose the main board is damaged or that P9 connector is missing. I don't have any diagram of mainboard or power supply. can anybody help me with that? maciej |
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Unregistered guest | Hi, someone try to use a 20pin->24pin adapter and then change some wire to be like compaq 24pin? |