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Hang on Gateway screen


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#1 Irien

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Posted 01 September 2010 - 01:04 PM

I don't restart my XP machine very often, but after about two weeks of increasingly irritating slowness / delayed responsiveness when opening new applications or tabbing between programs, I finally decided to reboot to see if that would help.

Not a great idea apparently, as now the machine won't load at all. The power supply fan kicks in when I turn it on, but dies down pretty quickly. The initial Gateway load screen (with F2/F10 to access BIOS) appears, and then... nothing happens. The screen stays there forever. No error beep codes, no response if I use the function keys to try to load the bios menu, and no safemode if I hit or hold F8 when I turn it on. Occasionally, it will give me the normal "yeah, enough already" beeps on keypress if I continue to hit f8 as it starts up, but even that's not consistent.

I'm having some trouble checking the forums for solutions, since the core problem is the absolute lack of anything happening. Any suggestions would be greatly appreciated before I start tinkering with stuff above my paygrade.

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#2 hamluis

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Posted 01 September 2010 - 01:45 PM

I would remove the hard drive...attach it as a secondary drive to a system...and run chkdsk /r on it, just to satisfy myself that I can eliminate something.

I would then check the PSU for functionality..on a different system.

A system that won't boot...has innumerable possible reasons...for not doing so. Some of them are hard/impossible to test if you cannot get beyond the Gateway screen.

Louis

#3 Irien

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Posted 02 September 2010 - 09:25 AM

Thanks for the reply! I put the hard drive into another machine: aside from asking me to re-authenticate the Windows installation, it worked fine. The ram sticks both check out as well. Is there anything left to check? Am I probably looking at a fried motherboard?

#4 dc3

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Posted 02 September 2010 - 09:35 AM

You can do the following test to determine if the problem is with the motherboard or the PSU. The process of turning on the PSU involves the motherboard which connects two wires in the twenty four pin connector from the PSU by the motherboard. The purpose of this test is two fold, to determine if there is a problem with the motherboard initiating this process, and to test the PSU.


Testing PSU

The purpose of this procedure is to bypass the motherboard to test the PSU.

Caution:
This procedure will involve working with live 12VDC electrical potentials which if handled improperly may lead to electrical shock. Proper precautions should also be taken to prevent electrostatic discharges (ESDs) within the case of the computer. For safety purposes please follow the instructions step by step.

First, shutdown your computer. Then unplug the power cable going into your computer.

Once you have opened the case, touch the metal of the case to discharge any static electricity.

The connector of the PSU which connects to the motherboard is readily recognizable by the number of wires in the bundle. To disconnect it you will need to press on the plastic clip to disengage it and then pull the connector up and away from the motherboard. Please take notice of the location of the locking tab and the notch on the socket of the motherboard, this will only connect one way as it is keyed. This wire bundle will have a memory of the way it has been installed and will want to bend back that direction, you may have to play around with it to find a position that the connector will stay in the same position while you run the test.

Posted Image

From the top left to right the pins are 13-24, the bottom from left to right are 1-12.


Please notice that there are PSUs with 24 pin and 20 pin connectors, the location of the green wire in the 24 pin connector is #16, and the green wire in the 20 pin connector is #14. If you look at the connector with socket side facing you and the clip on the top the number one pin will be on the bottom left corner. This makes the pin out for the 24 pin connector from left to right 13-24 on top, and 1-12 on the bottom. The pin out for the 20 pin connector from left to right is 11-20 on top , and 1-10 on the bottom. If you look at the connectors you notice that these are sockets that fit over the pins on the motherboard where the PSU cable attaches, this is where you will place the jumper. For a jumper you will need a piece of solid wire about the size of a paper clip (20-22 awg), preferably a wire with insulation. It will need to be large enough to fit firmly into the socket so that it will not need to be held in place while testing. You are at risk of electrical shock if you are holding the jumper when you power up the PSU. Insert one end of the jumper into the socket of the Green wire, and insert the other end into the socket of any Black wire.

Once the jumper is in place plug the cord back in. If the PSU is working properly the case fans, optical drives, hdds, and LEDs should power up and remain on. I would suggest that you not leave this connected any longer than is necessary for safety purposes.

At this point you can use a DC Voltage meter to read the different rail Voltages. You will want to insert the black probe into any of the Black (-) sockets, and insert the Red (+) probe in the five different colored sockets, one at a time. Below are the five different colors and their corresponding rail voltages. The Voltages should be within about ten percent plus or minus of the given values.

Yellow +12VDC

Blue -12VDC

Red +5VDC

White -5VDC

Orange +3.3VDC

To reconnect the 20/4 pin connector unplug the power cord, remove the jumper, and reconnect the connector. Take a moment at this time to make sure that nothing has been dislodged inside the case.

Edited by dc3, 02 September 2010 - 09:36 AM.

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