Question about Mach Speed Matrix P4MSD-800 (P4MSD-800 D2) Motherboard

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My unit won't power up - power supply is good and not sure about the on switch any help would be appreciated -- motherboard is in an old HP Pavlion 700 case

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Remove the little watch type battery from the mother board check the voltage with a meter should be about 3.5 volts. Then replace the battery on the mother board. This battery holds memory within the Bio chips on the mother board, if there was a problem that it sensed for turn on it will be in the Bio's memory, and maybe not allowing the computer to turn on, by removing the battery for a few minutes, the Bio's forget they had a problem, if you will. and the computer might turn on.
If you have all the voltages to the mother board from the power supply, it should turn on.
unless there is some reset circuit interfearing with it turning on. Or you might have a blown fuse on the mother board, I would check everything I could, and try everything I could, and if you still cannot get it to turn on take it to a computer shop and spend a few bucks for them to fix it.

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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1 Answer

Loud bang from system.Unit starts immediately power is supplied.Power switch does nothing.H/Drive and players run.No video ( card OK ) checked with another card. Can the problem be motherboard?


The load bang is most like an exploding capacitor in the switch mode power supply, especially if there is a burnt electrical smell from the power supply.
I suggest you borrow a switch mode power supply, remove the old power supply and install the replacement power supply. make sure it has the same or larger wattage unit.
If the computer still does not boot up then the exploding power supply has damaged the motherboard, and you need to replace then motherboard too. This may not be a cost effective solution.
This is an opportunity to get a new and better computer.

May 16, 2011 | Computers & Internet

1 Answer

E system 1212 Laptop won't switch on. Power


Laptops are so integrated that usually a system failure that involves power issues such as in your case where you cant get it turn on with anything on the screen mean the mainboard (motherboard) is damaged. This usually leads to buying a new laptop or paying for the board to be replaced which usually costs as much as the laptop.

May 12, 2011 | Computers & Internet

4 Answers

Hp pavillion a820n will not power up after power surge. Green light flashes when plugged in but no fan, no power at all. Uplugged everything, tried holding power button for 15-30 seconds, etc. But no...


Yes, you've likely got a failed power supply. If you would like to test it, a tester can be purchased for about $20US.
  • To remove the unit, unplug the unit and disconnect all the cables inside the case.
  • 4 screws can be found on the back of the case around the fan, near where you put the power cord in.
  • Once the screws are removed, the unit should simply lift out. Be careful not to let the unit fall onto the motherboard.
  • Look at the specs on the side paying particular attention to wattage (W) and the number of pins for the motherboard (20 or 24)
  • Purchase a similar unit with at least the same amount of available power.
  • Install the new unit with the 4 screws
  • Plug in the motherboard and drives

Mar 07, 2011 | HP Pavilion A820n (PP165AA) PC Desktop

2 Answers

Hp m1160n Green light is flashing, went thru all of the steps listed, and the troubleshooting guide on the hp website.No dice...computer will not turn on. tested power supply = good. tested power switch =...


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

hope this will help
don

Feb 27, 2011 | HP ATX-300-12Z (ATX30012ZBD) 300-Watt...

2 Answers

My old power supply had 4 wires going to the front panel on\off switch. The Dynex power supply does not support the switch. what do I use to turn the unit on or off. Will the unit function with out the...


Normally the front panel on/off power button and the front panel reset button plug into connector pins on your motherboard.

If you can find a User Manual for your motherboard it will show you exactly where the switch leads plug in on the motherboard. The motherboard's manufacturer and model number will be printed on the board somewhere.


Good luck.

Feb 05, 2011 | Dynex DX-400WPS 400-Watt Power Supply

1 Answer

When I turn on by pressing the power switch, the cpu fan just make a turn. That's all I have. I suspect the the power from both power supplies are good. Help me please.


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty

make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
hope this helps

Jan 10, 2011 | Gigabyte GA-7VA Motherboard

2 Answers

PC won't boot up.


recheck all connections, make sure the switch on the back of the power supply (if it has one) is set to the on position. there is a chance the motherboard has failed. with the power off examine the capacitors on the motherboard, especially the ones near the cpu. if they feel rounded on the top they have failed. unless you are good at soldering... consider buying a new motherboard.

Sep 23, 2009 | Intel D865GBF Motherboard

2 Answers

Unit is 3 years old. No help from HP (@$^@@*). Turn unit on, screen does not come on. dv6000 pavillion. can it be motherboard? dan


Hello,

It could be the motherboard and it could be a few other things. When was the last time you had the notebook powered on? Did you notice any problems then? If you have power but no video, try taking the battery out, uplug the AC cable and press the power button a few times. Reinstall the battery and AC cable and power on your pc. Give it a bit of time to boot, must in case it needs to finish booting from the last time it worked.

Good Luck
C2Solutions

Aug 07, 2009 | Computers & Internet

2 Answers

Not sure about upgrading power supply


In many cases the additional 4 pin section slides up and off of the main power plug for use in your particular unit.

Feb 20, 2009 | HP COMPAQ Presario SR5410F Pentium...

1 Answer

CPU Fan


Hello rc53_61,
If you look at the back of your old power supply you should be able to find the information you need (if you are going to replace the current power supply with the same one). The best place to find an exact power supply is visiting the manufacturer of your computer system for example: dell, hp, compaq, etc. You can replace a power supply rather easily, the only things you need to make sure is that the plug connection is compatible with the one on your motherboard and the power supply rating is the same or even a bit higher for wattage. Check the following links to find some good quality power supplies at a reasonable rate. These sites will help you with compatibility also by putting in your motherboard information. Let me know if you need further assistance.

Tiger direct

Directron


Just in case the links do not work properly

http://www.tigerdirect.com

http://www.directron.com

If you do not mind, please rate my help I would greatly appreciate it. Thanks





Sep 06, 2008 | MSI KT4 Ultra (MS-6590-010) Motherboard

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