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Athlon XP system won't turn on
Okay, I'm desperate for some help before I declare my new motherboard
DOA and call Asus. Here's the deal: 1. A few days ago, we had a horrible storm. I unplugged my old MB, but apparently too late: the system wouldn't boot. No CPU fan, no power supply fan, no nothing. I swapped the MB/CPU/RAM with another box, and it booted fine, so the power supply appears to still be good. When I put my old MB back in, the CPU fan came on for a few seconds as soon as the power supply was switched on (without hitting the case power switch), then went off. The standby light on the MB was lit, but nothing happened when I hit the case power switch. Same as before, no fans or anything. 2. Planning on upgrading soon anyway, I went ahead and ordered a new MB/CPU/RAM (Asus A7N8X-X with Athlon XP 3200+ and 1 GB of RAM). Lo and behold, I installed it in my old case, and got the exact same problem: CPU fan spinning up when the power supply is first turned on (which I assume is a self-test), but nothing when I hit the case switch. To rule out a problem with the case or PS, I stuck in another old MB, and it booted fine. 3. Since then, I've tried everything I can think of: I've tried reseating the CPU, RAM, and heat sink. I've reapplied the thermal paste. I've made sure the CPU fan is plugged in the right place. I've checked the CPU for bent pins. I've checked and double-checked the orientation of the ATX power switch connector to the MB's control panel. I've made sure the power supply connector is seated firmly. I've cleared the CMOS. I've tried it with RAM, without RAM, with video card, without video card, with HD's connected, etc. I tried it with a different CPU and a different heatsink/fan. I even tried it with a different power supply, new out of the box. I tried reseating the MB to make sure there wasn't a short somewhere, and even hooked it up sitting on an anti-static bag to make extra sure. Still no activity at all when I hit the case power switch. The standby light on the MB is always lit when it should be, but nothing happens at all. Am I missing anything obvious? Any other suggestions before I box the thing up and send it back? Thanks, Jeremy |
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#3
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Why didnt you replace the power supply first?
Okay, I'm desperate for some help before I declare my new motherboard DOA and call Asus. Here's the deal: 1. A few days ago, we had a horrible storm. I unplugged my old MB, but apparently too late: the system wouldn't boot. No CPU fan, no power supply fan, no nothing. I swapped the MB/CPU/RAM with another box, and it booted fine, so the power supply appears to still be good. When I put my old MB back in, the CPU fan came on for a few seconds as soon as the power supply was switched on (without hitting the case power switch), then went off. The standby light on the MB was lit, but nothing happened when I hit the case power switch. Same as before, no fans or anything. 2. Planning on upgrading soon anyway, I went ahead and ordered a new MB/CPU/RAM (Asus A7N8X-X with Athlon XP 3200+ and 1 GB of RAM). Lo and behold, I installed it in my old case, and got the exact same problem: CPU fan spinning up when the power supply is first turned on (which I assume is a self-test), but nothing when I hit the case switch. To rule out a problem with the case or PS, I stuck in another old MB, and it booted fine. 3. Since then, I've tried everything I can think of: I've tried reseating the CPU, RAM, and heat sink. I've reapplied the thermal paste. I've made sure the CPU fan is plugged in the right place. I've checked the CPU for bent pins. I've checked and double-checked the orientation of the ATX power switch connector to the MB's control panel. I've made sure the power supply connector is seated firmly. I've cleared the CMOS. I've tried it with RAM, without RAM, with video card, without video card, with HD's connected, etc. I tried it with a different CPU and a different heatsink/fan. I even tried it with a different power supply, new out of the box. I tried reseating the MB to make sure there wasn't a short somewhere, and even hooked it up sitting on an anti-static bag to make extra sure. Still no activity at all when I hit the case power switch. The standby light on the MB is always lit when it should be, but nothing happens at all. Am I missing anything obvious? Any other suggestions before I box the thing up and send it back? Thanks, Jeremy |
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