Question about Cornerstone ASUS TXP4 Socket 7 AT Motherboard (CLEAN PULLS)

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Asus TXP4 Motherboard will not turn on

After I hit the power button on my Asus TXP4 MOBO it just sits there. Power is getting to (AT) P8 & P9 as well as the the switch. I replaced the Power Supply Unit (and switch) with a brand new one I luckily found. No change. I do not see any lit lights on the MOBO. But after I turn on and off the switch 50 or 60 times it finally turns on (CPU fan) but it just sits there and does'nt boot. The ISA video card lights up both red and green. Installed, is Window 95 which I must have to run a PF cutting saw the computer is connected to. So, my delema is to replace the motherboard and video card with another ASUS TXP4 (so my hard drive will work) or find a compatible MOBO that will except my hard drive? What MOBO is compatible with the TXP4 so my hard drive will work? Is this right or can I do something else? The software that is installed on the hard drive to run the saw is no longer sold and I must use this hard drive until it fails. I do not have the physical software to reload on another hard drive. Please help!

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Most likely you are looking at a bad motherboard, there is probably a break somewhere in the connections. Check for blown capicators that would be a smoking gun. You can use a different motherboard but it has to be one that is compatible with your CPU. Most motherboards will come with a driver CD so you should be ok. It shouldn't be a big deal with your Operating System or Hard Drive if you replaced your motherboard. Otherwise, you could upgrade to a new system and do a image copy of your HDD to a new computer/HDD. I recommend Acronis True Image makes it really easy.

Posted on May 11, 2008

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Posted on Jan 02, 2017

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Dell Dimension 2400 PC Desktop how to wire



Industry standard PC, XT, AT, and LPX motherboards use the same type of main power supply connectors. They use two main power connectors: P8 and P9. Each of the P8 and P9 connectors has 6 pins that connect power supply to the motherboard.

May 29, 2014 | Dell Dimension 2400 PC Desktop

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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

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Asus mobo flashes on startup, no video


You should unplug the power cord from the power supply, pop out the cmos battery, switch the bios reset jumper to the 2 and 3 pins, wait about a minute, put the jumper back to 1 and 2 pins, put cmos battery back in, plug in power cord to psu and turn on pc. If you have any issues with this process please refer to your owner manual for the motherboard or look one up on their website. Please let me know if this fixes your issue.

Apr 30, 2010 | ASUS M4A77TD Motherboard

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No blue power light and doesnt turn all the way on no starting beep gateway gt5220


I would suspect a bad power supply. Before doing anything make sure power is actually getting to the computer. Check the power cord with a volt meter. You should have around 115 volts. If all is well you need to see if the power supply is putting out the correct voltage. Open the PC up and set the multimeter to DC voltage.
  1. Turn off the PC, but do not unplug it. Open the system unit. Set the multimeter to read DC volts in the next range higher than 12 volts. Locate a power connector similar to the hard drive (or CD-ROM drive connector that is unused) and turn on the PC.
  2. You can also unplug a drive connector and use it. Turn on the PC and insert the BLACK probe into the power connector on one of the BLACK wires. Touch the RED probe to the YELLOW wire on the power connector.
  3. The multimeter reading should be +12 volts. Now touch the RED probe to the RED wire and the reading should be +5 volts. If no readings or different readings occurred, you’ll have to replace the power supply. If the readings were correct, you should check the P8 or P9 connectors at the motherboard. These connectors may also be named P4 and P5. To check these connectors, perform the following:
    • Insert the BLACK probe into P8 at one of the BLACK wires. Insert the RED probe into the P8 connector at the RED wire. The reading on the multimeter should be +5 volts.
    • Check the power going to the motherboard connections by inserting the RED probe into P8 at the YELLOW wire and you should get +12 volts. Leave the BLACK wire touching the BLACK wire at the P8 connector. Check the BLUE wire and the reading should be a -12 volts.
    • Now move the BLACK probe to the BLACK wire on the P9 connector. Test the WHITE wire by inserting the RED probe and the reading should be -5 volts. Check the RED wires on the P9 connector and you should get +5 volts on each red wire. You won’t get exactly 5 or 12 volts, but the readings will be very close, such as 5.02 volts.
    • If the Power Supply is a couple of volts off in either direction, such as when the RED wire should be reading -5 volts but it reads -8 volts, or if there are no readings, replace the power supply. Curtorsey: IT Professionals

Mar 09, 2010 | Gateway GT5220 PC Desktop

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I need an ASTEC power supply model SA147-3506 for IBM P-2 computer, Can anybody help me??!!


145 Watt power supply with the old style AT motherboard power cable connectors. (2 Each)

http://www.playtool.com/pages/psuconnectors/connectors.html#oldpc

I just put Astec SA147-3506 in my browser search bar, and came up with a number of search hits. Prices ranged from $50 to $170!

And it's a 145 Watt power supply! Astec is a cheap quality power supply manufacturer, to boot!

You know, there is a way to use a newer reliable power supply, and the AT power supply motherboard connectors, off of the power supply you have.

It's not for the squeamish, but can be done.

The power wires are removed from the ATX power supply motherboard cable connector, of the new power supply, and inserted into the AT power supply connectors.
(ATX 12V power supply is the newer one. AT power wires removed from the P8, and P9 connectors of your old power supply)

Interested?

Jan 20, 2010 | Computers & Internet

1 Answer

Power supply suddenly 'dead'


You check the power supply using multimeter. but before everything make sure the you are getting power from the power outlet.

Here is how you can check the power supply with multimeter

If the wall outlet and the power cord are good, make sure the connection at the motherboard is secure. Then you may have to face the fact that the power supply itself is bad. If you have a multimeter, you can test the power supply output before purchasing a new one. Simply follow these steps:
  1. Turn off the PC, but do not unplug it. Open the system unit. Set the multimeter to read DC volts in the next range higher than 12 volts. Locate a power connector similar to the hard drive (or CD-ROM drive connector that is unused) and turn on the PC.
  2. You can also unplug a drive connector and use it. Turn on the PC and insert the BLACK probe into the power connector on one of the BLACK wires. Touch the RED probe to the YELLOW wire on the power connector.
  3. The multimeter reading should be +12 volts. Now touch the RED probe to the RED wire and the reading should be +5 volts. If no readings or different readings occurred, you’ll have to replace the power supply. If the readings were correct, you should check the P8 or P9 connectors at the motherboard. These connectors may also be named P4 and P5. To check these connectors, perform the following:
    • Insert the BLACK probe into P8 at one of the BLACK wires. Insert the RED probe into the P8 connector at the RED wire. The reading on the multimeter should be +5 volts.
    • Check the power going to the motherboard connections by inserting the RED probe into P8 at the YELLOW wire and you should get +12 volts. Leave the BLACK wire touching the BLACK wire at the P8 connector. Check the BLUE wire and the reading should be a -12 volts.
    • Now move the BLACK probe to the BLACK wire on the P9 connector. Test the WHITE wire by inserting the RED probe and the reading should be -5 volts. Check the RED wires on the P9 connector and you should get +5 volts on each red wire. You won’t get exactly 5 or 12 volts, but the readings will be very close, such as 5.02 volts.
    • If the Power Supply is a couple of volts off in either direction, such as when the RED wire should be reading -5 volts but it reads -8 volts, or if there are no readings, replace the power supply.

Mar 22, 2009 | Computers & Internet

2 Answers

Power LED on but no boot up


Its the Mother Board..I had the same problem and had to have a new MB put in

Feb 17, 2007 | Gateway (4000811) Motherboard

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