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compaq Presario problems
Hi Guys & Gals;
I have fallen air (?) to a Compaq Presario (desktop) "519J". It is mot working absoloutly nothing, not even fans or a beep. There is however, a small greem light on the power supply that continualy blinks (continualy) whenever the unit is pluged in. I am assuming that there is a fuse blown. Before I replace the power supply, am I right, or should I look elseware for the problem. Keep happy Glenn |
#2
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compaq Presario problems
On May 30, 10:39 pm, "iamhungery" wrote:
I have fallen air (?) to a Compaq Presario (desktop) "519J". It is mot working absoloutly nothing, not even fans or a beep. There is however, a small greem light on thepower supplythat continualy blinks (continualy) whenever the unit is pluged in. I am assuming that there is a fuse blown. Before I replace thepower supply, am I right, or should I look elseware for the problem. Before you replace anything - even disconnect any wires - a problem should first be identified. Power supply 'system' suspects can be identified in but two minutes with the essential computer tool - a 3.5 digit multimeter. A tools so ubiquitous as to be sold even in K-mart, Lowes, Radio Shack, Tru-Value hardware for only $20; $10 on sale. Procedure is posted previously in "When your computer dies without warning....." starting 6 Feb 2007 in the newsgroup alt.windows-xp at: http://tinyurl.com/yvf9vh Notice voltage on purple wire. That voltage could be completely 'out of spec' and yet light would still glow. Also notice when purple wire is and is not powered. That wire is why you always remove AC power cord before making any changes. Notice I also said 'system'. Power supply 'system' includes more than just a power supply. With numbers - good or bad - then post them. Those numbers may also provide other useful facts. Your replies will only be as good as provided facts - the numbers. Long before looking at any other suspect, you must first establish the integrity of your power supply 'system'. Anything or everything can act bad if 'system' numbers are not correct. |
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compaq Presario problems
On May 30, 7:39 pm, "iamhungery" wrote:
Hi Guys & Gals; I have fallen air (?) to a Compaq Presario (desktop) "519J". It is mot working absoloutly nothing, not even fans or a beep. There is however, a small greem light on the power supply that continualy blinks (continualy) whenever the unit is pluged in. I am assuming that there is a fuse blown. Before I replace the power supply, am I right, or should I look elseware for the problem. Keep happy Glenn The blinkey green light on Compaq power supplies is a Bad Thing. I'd pick the power supply as the most likely culprit. Most Compaq power supplies are standard ATX, but some are not. There's a run of them, in the early P4 range that have a 24 pin connector, PLUS an additional 4 pin connector. Last time I priced one, it was insanely expensive, to order one from HP (who bought Compaq). On the order of 200USD. |
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compaq Presario problems
The Paq also used a non-standard 24-pin power connector in some of its DeskPro
Socket 370 desktops. At least I think it is non-standard. Never saw a pinout to compare with the newer 24-pin BTX... Ben Myers On Sat, 02 Jun 2007 09:01:19 -0700, " wrote: On May 30, 7:39 pm, "iamhungery" wrote: Hi Guys & Gals; I have fallen air (?) to a Compaq Presario (desktop) "519J". It is mot working absoloutly nothing, not even fans or a beep. There is however, a small greem light on the power supply that continualy blinks (continualy) whenever the unit is pluged in. I am assuming that there is a fuse blown. Before I replace the power supply, am I right, or should I look elseware for the problem. Keep happy Glenn The blinkey green light on Compaq power supplies is a Bad Thing. I'd pick the power supply as the most likely culprit. Most Compaq power supplies are standard ATX, but some are not. There's a run of them, in the early P4 range that have a 24 pin connector, PLUS an additional 4 pin connector. Last time I priced one, it was insanely expensive, to order one from HP (who bought Compaq). On the order of 200USD. |
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compaq Presario problems
On Jun 2, 12:01 pm, " wrote:
The blinkey green light on Compaq power supplies is a Bad Thing. I'd pick the power supply as the most likely culprit. Most Compaq power supplies are standard ATX, but some are not. Long before replacing anything, one first identifies the failure. What is only suspected does not matter. What numbers report is important. Is the pinout an ATX standard? Again, the 3.5 digit multimeter would answer that questions in conjunction with data from pictures provided by pennyw, kony, and others: http://www.bluemax.net/techtips/ATXP...pplyWiring.htm http://techrepublic.com.com/5102-10586-5566528.html www.ochardware.com/articles/psuvolt/psuvolt.html http://www.hardwarebook.net/connecto.../atxpower.html Assuming a power supply is bad and then swapping on that assumption may exponentailly complicate a failure. If the power supply is not ATX standard, then it could do massive more damage. Shotgunning - replacing parts only on 'feelings' - is not how anything should be repaired. The meter is essential to first determine what in a power supply 'system' is defective (yes - a system and not just a power supply), and to determine is power supply is ATX standard. |
#6
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compaq Presario problems
Well, as a regular practicioner of the black art of computer repair, often the
quickest and easiest way to determine which part failed is to substitute a suspected component with a known good one from the test bench. Of course, doing so presupposes that one has plenty of inexpensive spare parts to sacrifice if some other component is bad and causes yet another failure. Doing so also presupposes that one knows that the pinouts are standard or non-standard, same as if one were to use a mulitmeter. I continue to this practice because it has worked well for me for a number of years. I have a multimeter, but I do not use it very often... Ben Myers On Sat, 02 Jun 2007 11:59:08 -0700, w_tom wrote: On Jun 2, 12:01 pm, " wrote: The blinkey green light on Compaq power supplies is a Bad Thing. I'd pick the power supply as the most likely culprit. Most Compaq power supplies are standard ATX, but some are not. Long before replacing anything, one first identifies the failure. What is only suspected does not matter. What numbers report is important. Is the pinout an ATX standard? Again, the 3.5 digit multimeter would answer that questions in conjunction with data from pictures provided by pennyw, kony, and others: http://www.bluemax.net/techtips/ATXP...pplyWiring.htm http://techrepublic.com.com/5102-10586-5566528.html www.ochardware.com/articles/psuvolt/psuvolt.html http://www.hardwarebook.net/connecto.../atxpower.html Assuming a power supply is bad and then swapping on that assumption may exponentailly complicate a failure. If the power supply is not ATX standard, then it could do massive more damage. Shotgunning - replacing parts only on 'feelings' - is not how anything should be repaired. The meter is essential to first determine what in a power supply 'system' is defective (yes - a system and not just a power supply), and to determine is power supply is ATX standard. |
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