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PC Wouldn't Shut Off Now Won't Power Up
"The Browns" wrote in message ... Hi, My PC had been refusing to shut off. Now it won't power up. Can someone suggest a possible cause? Motherboard? Power supply? The past four times I tried to shut down my PC it wouldn't turn off. Holding the power button produced a click, a drop in power (noise) for about half a second then it would start to power up again. Pulling the plug or turning off the UPS was the only way to shut it off. This morning it refused to power up. It gets so far then appears to be doing a reset. It doesn't get far enough to get into the BIOS. I unplugged the Disk and CD/DVD drives to reduce load (and protect them), then reseated power and power control connectors. Those had no effect. The PC is homebuilt with an ASUS A7N8X Deluxe MB, about 3 1/2 years old, the PS is an Antec SmartPower 350, maybe a year old. The box is generic. Any help appreciated. Thanks, Gary Ram maybe..............if you have 2 or 3 strips, remove them one at a time and try restarts. |
#2
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PC Wouldn't Shut Off Now Won't Power Up
Hi,
My PC had been refusing to shut off. Now it won't power up. Can someone suggest a possible cause? Motherboard? Power supply? The past four times I tried to shut down my PC it wouldn't turn off. Holding the power button produced a click, a drop in power (noise) for about half a second then it would start to power up again. Pulling the plug or turning off the UPS was the only way to shut it off. This morning it refused to power up. It gets so far then appears to be doing a reset. It doesn't get far enough to get into the BIOS. I unplugged the Disk and CD/DVD drives to reduce load (and protect them), then reseated power and power control connectors. Those had no effect. The PC is homebuilt with an ASUS A7N8X Deluxe MB, about 3 1/2 years old, the PS is an Antec SmartPower 350, maybe a year old. The box is generic. Any help appreciated. Thanks, Gary |
#3
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PC Wouldn't Shut Off Now Won't Power Up
"The Browns" wrote in message
... Hi, My PC had been refusing to shut off. Now it won't power up. Can someone suggest a possible cause? Motherboard? Power supply? The past four times I tried to shut down my PC it wouldn't turn off. Holding the power button produced a click, a drop in power (noise) for about half a second then it would start to power up again. Pulling the plug or turning off the UPS was the only way to shut it off. This morning it refused to power up. It gets so far then appears to be doing a reset. It doesn't get far enough to get into the BIOS. I unplugged the Disk and CD/DVD drives to reduce load (and protect them), then reseated power and power control connectors. Those had no effect. The PC is homebuilt with an ASUS A7N8X Deluxe MB, about 3 1/2 years old, the PS is an Antec SmartPower 350, maybe a year old. The box is generic. Any help appreciated. Thanks, Gary With the initial symptom of not being able to shut down the machine using the power button and now it no longer powers on might indicate that the power button itself is defective. It's easily tested by unplugging the cable going to the power button at the motherboard and momentarily shorting the same pins on the motherboard and see if the unit powers back on. From there the list of causes can grow quickly, from power supply, motherboard, memory, etc. |
#4
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PC Wouldn't Shut Off Now Won't Power Up
On Wed, 14 Mar 2007 17:06:19 -0500, "The Browns"
wrote: Hi, My PC had been refusing to shut off. Now it won't power up. Can someone suggest a possible cause? Motherboard? Power supply? The past four times I tried to shut down my PC it wouldn't turn off. Holding the power button produced a click, a drop in power (noise) for about half a second then it would start to power up again. Pulling the plug or turning off the UPS was the only way to shut it off. This morning it refused to power up. It gets so far then appears to be doing a reset. It doesn't get far enough to get into the BIOS. I unplugged the Disk and CD/DVD drives to reduce load (and protect them), then reseated power and power control connectors. Those had no effect. The PC is homebuilt with an ASUS A7N8X Deluxe MB, about 3 1/2 years old, the PS is an Antec SmartPower 350, maybe a year old. The box is generic. Any help appreciated. Thanks, Gary You didn't tell us enough about the hardware, the rest of the system, but I would suspect the power supply has failing capacitors and look there first. |
#5
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PC Wouldn't Shut Off Now Won't Power Up
On Mar 15, 3:06 am, "The Browns" wrote:
Hi, My PC had been refusing to shut off. Now it won't power up. Can someone suggest a possible cause? Motherboard? Power supply? The past four times I tried to shut down my PC it wouldn't turn off. Holding the power button produced a click, a drop in power (noise) for about half a second then it would start to power up again. Pulling the plug or turning off the UPS was the only way to shut it off. This morning it refused to power up. It gets so far then appears to be doing a reset. It doesn't get far enough to get into the BIOS. I unplugged the Disk and CD/DVD drives to reduce load (and protect them), then reseated power and power control connectors. Those had no effect. The PC is homebuilt with an ASUS A7N8X Deluxe MB, about 3 1/2 years old, the PS is an Antec SmartPower 350, maybe a year old. The box is generic. Any help appreciated. Thanks, Gary One possibility is that the reset button is stuck in the ON (closed) position. Disconnect the switch from the front panel connectors header on the motherboard and try to power up again. (When I do this kind of thing while trying to isolate a defect, I usually disconnect the hard disk first). |
#6
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PC Wouldn't Shut Off Now Won't Power Up
My PC had been refusing to shut off. Now it won't power up.
the system, but I would suspect the power supply has failing It was the power supply. I took it to a local shop who tested it for free (not including the price of the new one they sold me :-)) I had guessed the motherboard which would have meant finding a socket A MB quickly (nearly impossible) or spending $400+ on an upgrade. Thanks to all who responded. Gary |
#7
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PC Wouldn't Shut Off Now Won't Power Up
On Sat, 17 Mar 2007 01:55:42 -0400, "Gary Brown"
wrote: My PC had been refusing to shut off. Now it won't power up. the system, but I would suspect the power supply has failing It was the power supply. I took it to a local shop who tested it for free (not including the price of the new one they sold me :-)) I had guessed the motherboard which would have meant finding a socket A MB quickly (nearly impossible) or spending $400+ on an upgrade. Thanks to all who responded. Gary I hope they sold you a good one - that board uses 5V power for the CPU vcore subcircuit, meaning for best results either an ATX 2.0 or older PSU, or a very high capacity and high quality newer PSU design is needed. Otherwise, it's likely to have another PSU failure. An honest combined rating on the 3.3+5V rails of 200W, or more with a lot of parts like (for it's time) higher end video card, is highly preferred. A more conservative rating would be 230W+ combined rating for those rails, something even most modern 500W PSU don't provide, but was not uncommon on older 350-400W PSU. |
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