HP casing change prompt BIOS not saving issue

Hewlett-packard / D530 sff dc578a
May 24, 2010 at 06:00:33
Specs: xp-pro-sp3, p4-2.4ghz-ram1gb
my hp d530, in its original casing, was working ok until yesterday. When I started it up sounds like fireshots came form it. So I immediately turned it off. Later I tried to power it but it showd a red led light and did not go ahead.
Assuming the power supply to be dead, I took out the motherboard, hard drrives and memory form the original casing and installed it in another atx casing.
Unfortunately the casing had broken front panel wiring therefore I did not attach any of these wires to the motherboard.
When I turned on the system it showed green led on the motherboard but nothing showed up on the monitor screen. After some trying in vain I took out the battery for 15 seconds and then put it back. This time the computer booted up with default settings and saying something about system fan not being not there and detected my hard drives and counted the memory. I pressed F1 to save the settings and booted into windows. Worked fine in windows xp.
So I shut the computer down after working.

Next time I booted I had to repeat all this. Now each time I boot my computer I have to take out the battery for sometime then I have to accept and save whatever it says in the bios. It says that something has happened to real time clock and that I might have to change the battery.
But the battery is the same and was working ok just one day back.
Is it because something which should be attached from the front panel is not there. As now I dont have to press any casing button. It boots directly from wall switch when it boots at all.
Please help and guide me as I dont want to spoil this thing and want to use it for sometime. I have a feeling that I have done a blunder type mistake wihile doing all this.
thanks very much.

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May 24, 2010 at 17:58:42
The front panel connections shouldn't matter although it's odd it turns on when you connect it to a wall socket.

Most power supplies provide a small charge to the motherboard even when the PC is off. Since you don't have the power cord always connected maybe that's a factor but I can't say for sure. I think that's just for the 'power on' options but it might also hold a charge if the cmos battery is bad.

The cmos battery only holds the motherboard settings when the PC is off. When it's on the battery is irrelevent as that circuit is charged by the power supply. So if you have that same problem every time you turn it on then the first thing to suspect is a bad battery.

Or possibly the battery is not making a good connection or the solder joints on its holder are broken. Or maybe something is shorting it. Is the motherboard contacting the metal case someplace it shouldn't?

The power button on the front case only has two wires. Can't you locate those and attach them to the power switch pins on the motherboard?

Unless the hp case has a proprietary power supply that's not easily replaced there wasn't any reason to move all your hardware to another case. You could have just put in a different power supply.

You're not really green until you're soylent green.

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May 25, 2010 at 04:15:31
I changed the battery with a new one but the problem is still there. I had a look at the battery socket but it looked shining and nothing seemed to be broken.

The motherboard has a steel plate covering the backside of it. I have installed the motherboard with the steel plating. So I think that leakage should not be there. But I am not sure.

The power switch of the casing does not move at all and seems to be fixed.
The reset buttons seems to be working . I set the two pin connector of the reset wiring to the reset pins of the motherboard but nothing happened

You said that the power pins are two in number .. Can I use the two pin connector of reset to the two pins of power on the motherboard. Will it work.

I tried to find the power pins on the motherboard but could not locate them. Please help me locate them.

I tried to read here and there and found that there is a button beside the battery which hp calls sw50 button. If pushed for 5 seconds it clears cmos which can then be reconfigured.
Should I attempt to do it ?

thanks for your reply . It is very kind of you to help. I appreciate it very much.

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May 25, 2010 at 08:38:53
The problem seems to be solved for now.
I booted the computer and by pressing F10 went directly into the bios and setup time & date and my hard drives there and did safe and exit. After that I took power cables out of the comuter for a while.

Then I took out the power switch and cleaned it thoroughly and added new wiring to it.and attached the connector with the reset two pins on the motherboard.

After that I started the computer. It started and stopped then I pushed the powe button then it booted into windows.
It is still giving the case fan error but that is not a big problem for now.

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Related Solutions

May 25, 2010 at 17:16:26
You can probably disable the case fan alert in cmos/bios setup.

I'm glad it seems to be working. Keep us updated.

You're not really green until you're soylent green.

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January 11, 2011 at 07:24:27
near the front of the board, in front of the memory bays & behind the IDE plug is a signle plug. If you place a jumper across the two pins the case fan error will go away. The bios is just looking for a closed connection.

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