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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 10-16-2006, 05:25 AM   #16
michaelk
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When the computer is off the only voltage you should be able to measure is the standby voltage (5 VDC) on pin 9. However, Compaq may use a non-standard pinout.

http://pinouts.ru/Power/atx_v2_pinout.shtml
 
Old 10-17-2006, 07:25 PM   #17
Israfel2000
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Quote:
Originally Posted by blame582
hello

i'm pretty sure its your power suppy but just to be safe
what you need to do is ground out you tester (black probe)
to either of the black wires on the 4 pin molex connector
now using the red probe test the voltages
red wire = 5volt
yellow wire = 12volts

if you get those results move to the ATX connector

again ground out you black probe to a black wire
and test your wire for the voltage

orange should be around +3.3 V
red should b e around +5.0 V
yellow should be around +12.0 V
White should be around -12.0 V
those are the only one i remember

but you need to complete your circuit with a + (to the red probe) and - (to the black probe) wire the only time i know of this not appling is with the white wire and one of the yellow wires which gives you +24 voltor the red +5V with the Yellow +12V which gives you +7V

let us know what you find
Blame

I did what you said. I put the black probe on the black (ground) wire and the red probe on the others. I got different results (probably worse) than the first time.

Here they are:

WIRE Volts

Brown = 1.3
Brown = 1.3
Brown = 1.3
Blue = 0.0
Black = 0.0
Black = 0.0
White = 0.2
Red = 0.2
Black = 0.0
Black = 0.0
Black = 0.0
Black = 0.0
Red = 0.1
Gray = -16.8
Brown = 1.3
Green = 5.06
Red = 0.1
Red = 0.1
Orange = -2.7
Pink = 3.323
White/Bluestripe = -15.5
White/Redstripe = -14.5
Brown = -0.6


*Note the striped wires from the first results*

Quote:
Originally Posted by dive
Quote:
Originally Posted by Israfel2000
I have a computer with RedHat Linux installed. When ever I turn on my machine it will not show anything on the monitor. I used another monitor but same thing. I thought it could be the video card so I used another but got the same results. I also noticed the harddrives won't work either yet when I put them in another computer they work just fine. I'm stuck and I want to use my computer again. I don't know if this is enough info for any one to give a hint on what's wrong with my computer. Any help will be greatly appreciated. Thx in advanced.

A black monitor on boot could be an unsupported framebuffer mode. Usually the way to test this is to boot up the computer and leave it running and try login in blind to see if X will start.

I tried doing that a while back before I started this thread. I never got the X to start. :/

Quote:
Originally Posted by michaelk
When the computer is off the only voltage you should be able to measure is the standby voltage (5 VDC) on pin 9. However, Compaq may use a non-standard pinout.

http://pinouts.ru/Power/atx_v2_pinout.shtml
Thanks for the link. It help me to know which are the volts that each wire has yet I never gor the same results.

Since I'm getting different results I'm starting to think I should get a new power supply. I don't know maybe I'm doing it all wrong. OH GOD! I'm getting depressed.

Now, a thing you guys should know is that I live in the country side up in the mountains. Everytime there is a tropical storm there are frequent lightning strikes around and on the house where I live. Also there are frequent power outs. Sounds scary but thanks to God no one gets hurt in those storms, well, at least for the fifteen years I have been living there. Well, enough of me.

If it is the power supply that is messing up, can it also be the voltage regulator that is not giveing the right voltage to the PC? If it is, where can I get one? Or do I have to buy the whole power supply?

*Which is probably better for me to get the power supply.*
 
Old 10-17-2006, 07:40 PM   #18
michaelk
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It would be cheaper in the long run to purchase a new power supply then to repair it.
Electronics are sensitive to brown outs as well as surges and I suggest getting a UPS.
 
Old 10-17-2006, 11:07 PM   #19
blame582
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i would have to say its your power supply and second what michaelk said about the UPS to use as back up

what ever you do DONT REPAIR YOUR POWER SUPPLY YOUR SELF
reasons is the compacitors carry alot of current even when there unplugged
and you may end up just damaging more in you computer

blame
 
Old 10-19-2006, 05:00 PM   #20
Israfel2000
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Quote:
Originally Posted by blame582
i would have to say its your power supply and second what michaelk said about the UPS to use as back up

what ever you do DONT REPAIR YOUR POWER SUPPLY YOUR SELF
reasons is the compacitors carry alot of current even when there unplugged
and you may end up just damaging more in you computer

blame
Or get shocked by it. I'll buy a new one before that happens

Thx guys. Thx all for your help.
 
  


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