HP Compaq d530 PSU Repair > Additional power supply info & Caveats

hp d530 SFF Here's some more information that may help when you have a blown d530 SSF power supply (PDP-124P).

How to remove a PDP124P PSU from an HP Compaq d530 SFF desktop PC
Repair Notes (technical)

Use a d530 motherboard in a standard ATX case?

The d530 SFF uses a standard micro-ATX format mothebroard. Such a board would fit correctly in a full size ATX case, even to the point that the screw holes align properly. If you're thinking of doing so, read on...

Be warned - the d530 system board was designed to be used with its tray. Not only does the tray provide a matching I/O backplate, it also provides heatsinking for the transistors on the underside of the motherboard, via a heat transfer pad. The transistors are part of a buck converter, which transforms 12 volts down to the voltage required by the Intel Pentium 4 CPU. Should these transistors be allowed to overheat, they may fail; a more likely scenario would see them generate enough heat to cause the capacitors to leak (aka capacitor rot, capacitor plague, etc), which would let unregulated voltages damage the CPU.

If you can manage to find a way of fitting a suitable heatsink, then by all means put the d530 motherboard in a standard ATX case. Otherwise, putting it in a new ATX case with no suitable heatsinking may simply create future problem.

The poor man's solution

If you urgently need to get a d530 with a blown PSU up and running quickly, you can always connect a standard ATX PSU. Make sure you connect the ATX12v connector - a lot of people forget this - otherwise the system won't boot. You can leave the 'fan command' cable connected if you're leaving the old PSU attached. Without the connection, the system will complain about it when booting. Already removed the d530 PSU? See below for a solution.

The Fan Command connection

Near the DDR SDRAM slots is a 2-pin header for the 'Fan Command' connection. This lets the motherboard throttle the d530 PSU fan in unison with the other fans (HDD and CPU). If left unconnected, a message will appear during POST.

If you have installed the board in a normal ATX case, you can trick the system by bridging the pins with a 10K ohm resistor.


sgeod, Mon, 28 Sep 2009 12:41 pm: Reply
Many people report that HP PSU has different connector layout from standard PSU and connecting will damage either PSU or MB or both. It has different wire colors on the connector.
Al, Thu, 15 Jul 2010 09:30 am:
I have connected up a standard ATX psu and it works fine. I have a black screen when on restart but works fine when shut down and start by pressing the power button.

vogo, Sat, 31 Oct 2009 07:50 am: Reply
Not true. The PSU has a standard ATX 10-pin connector. Reference is available on page A-8, http://h20000.www2.hp.com/bizsupport/TechSupport/CoreRedirect.jsp?redirectReason=DocIndexPDF&prodSeriesId=316713&targetPage=http%3A%2F%2Fbizsupport1.austin.hp.com%2Fbc%2Fdocs%2Fsupport%2FSupportManual%2Fc00072736%2Fc00072736.pdf

steev2000, Sun, 10 Jan 2010 02:58 am: Reply
I plugged in a Dell 200W to get it going. Worked OK, except for the 'Fan Command'.

Adam, Thu, 14 Jan 2010 06:51 pm: Reply
I don't know what the problem is?? I have put numerous D530 Motherboards into standard ATX Cases.... I always leave the metal plate on and screw through it....
Oleks, Sat, 19 Jun 2010 09:24 pm:
I've put p6b580 in an ATX case and can not get audio out of jack. Should I set jumpers somewhere? I do not have original case. Drivers OK. When audio connector on the half way out of jack I can hear weak sound from system speaker.

kfong6932, Fri, 17 Dec 2010 08:50 pm: Reply
D530 failed to start up, red leds blinked for a few times and every thing stopped. Green LED on motherboard was on. Any advice, pls ? Thanks.
email : kfong6932@gmail.com

Robert, Sun, 27 Feb 2011 12:34 am: Reply
I didn't know what to do to transfer a D530 motherboard into a standard ATX case dealing with the "Fan Command" but now I know what to do! I just wish I knew how many WATTS the 10K ohm Resistor has to be for the motherboard to work correctly without any damage to the motherboard or any other hardware in the computer!

Robert, Sun, 27 Feb 2011 12:38 am: Reply
Does anyone know how many WATTS the 10K ohm resistor should be to trick the system dealing with the "Fan Command"? I would really appreciate any help from someone! If you have the answer to my question please email me! Thanks
Brad, Tue, 09 Aug 2011 12:00 pm:
12V max so V^2/10000=0.0144 W so a 1/8W will be plenty or a !/4W if that is easier to find.

cristian, Thu, 14 Jul 2011 09:40 am: Reply
hola tengo una compu de esta y cayo un rayo ella no esnciende la conecto y solo apaga y enciende la luzz verde que trae en la tarjeta madre.. necesito ayuda por favor mandemen sugerencias

daeverhiguera, Thu, 15 Dec 2011 11:28 am: Reply
yo tengo 3 pc de estas pero una de ellas enciende el cpu y el monitor no y solo la abri para limpiarla mi correo es daever99@gmail.com

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