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#1
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CPU fan runs as soon as PC plugged in.
Hello,
My girlfriend's eMachines T2825 is experiencing the following problem. As soon as the PC is plugged into an outlet, the CPU fan spins up and the HDD light goes on and remains on, without me even touching the on/off switch. The power light does not go on, the computer does not POST, and the only way to get it to stop is to kill the power at the outlet. Several events led up to the current situation. Two days ago, in the morning, she let me know that the computer would not power up when she tried to turn it on. Before going to work, I only had time to check to make sure that the computer was plugged into a working outlet. That night, when I got home from work, I unplugged the PC, double checked that the outlet was live, and plugged the pc in again. When I pressed the power button, the computer started, but there was no output to the monitor, and no POST beeps. I had to hold in the power button for 5s to get it to shut down. After waiting, I tried the power button again. This time the computer booted normally (single beep on POST), but the mouse and kb were unresponsive. I replaced the PS/2 mouse with a usb one, which worked, but a few seconds later, windows shut down without warning. The power did not go off though (which I guess is due to power management settings in windows), and I had to again manually power down the computer. The next time I tried, the computer again successfully booted, this time the mouse and kb worked, but a couple minutes later the computer again shut down without warning. After again manually powering down, I gave it a rest for 20min or so, after switching off the surge protector. Ever since then, whenever the computer is connected to a live outlet, the HDD light comes on, CPU fan spins up, and computer otherwise acts dead. No hardware changes have been made since the computer was purchased a few years ago, and I can't think of any other events that might be relevant. Any help or advise would be greatly appreciated, Fran |
#2
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CPU fan runs as soon as PC plugged in.
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#3
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CPU fan runs as soon as PC plugged in.
try cleaning and blowing out all dust, reseat all your parts(pull them out
clean and reinstall.) -- Love and Teach, Not Yell and Beat Stop Violence and Child Abuse. No such thing as Bad Kids. Only Bad Parents. The most horrible feeling in the world is knowing that No One is There to Protect You. A64 3500+, Gigabyte GA-K8NSC-939,AIW 9800 Pro 128mb MSI 550 Pro, X-Fi, Pioneer 110D, 111D Antec 550 watt,Thermaltake Lanfire,2 Gb OCZ Platinum 2-3-2-5 2XSATA 320gb Raid Edition, PATA 120Gb XP MCE2005, 19in Viewsonic,BenchMark 2001 SE- 19074 Games I'm Playing- Falcon 4, winSPWW2, winSPMBT, Call of Duty War Chest |
#5
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CPU fan runs as soon as PC plugged in.
The other thing Emachines kill is their processors. Hardly any
computers kill chips, but emachines do, with a vengeance. In fact, just count on replacing at least 2 of the following 4: Motherboard Power supply Processor RAM. (probably not) Hmm, doesn't sound good for this PC so far. I'm getting a new Power Supply tomorrow, hopefully that will work. If it doesn't, I guess the next thing I'll try is a new motherboard, although with this being my first foray into the inside of a computer case, it's not something I look forward to (besides the learning experience, which I'm actually quite enjoying). A couple more questions (sorry, I'm new to this): Besides checking the caps (none of which appear to be bulging or leaking), is there any other way to tell if my MB is shot without shelling out for a new one? Is it possible to gain any insight into the condition of the processor from inspection? I haven't removed the fan and heat sink yet, but haven't noticed any obvious signs like smoke or odor. Thanks for the replies, Fran |
#6
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CPU fan runs as soon as PC plugged in.
VanShania wrote: try cleaning and blowing out all dust, reseat all your parts(pull them out clean and reinstall.) Thanks, I'll definitely try that before obtaining any more new components. fp |
#7
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CPU fan runs as soon as PC plugged in.
Reasons that could create the various and inconsistent anomalies are
long and numerous. Start by confirming what is good. A power supply 'system' (which is more than just a power supply) could have been defective even when computer booted. Furthermore, fan spinning or light illuminating tells us nothing other then the AC power cord is connected. A 3.5 digit multimeter in less than 2 minutes will confirm power supply 'system' integrity or indicate a probably suspect. Just like in CSI, follow the evidence - do it quickly - and get a definitive answer. Start by measuring the purple wire (from power supply to motherboard) with AC power connected, computer powered off, and not disconnecting anything. That voltage must measure more than 4.87 volts when connected to motherboard. Then measure green wire voltage that should exceed 2 volts. When power switch is pressed, that voltage should immediately drop to less than 0.8 volts and stay there. Meanwhile, gray wire should be near zero volts before switch is pressed and rise to well above 2.4 volts within seconds after switch is pressed. Finally when switch is pressed, one of red, purple, orange, and yellow wires should rise or maintain more than 3.23, 4.87, and 11.7 volts. Each number confirms integrity or will provide others with an answer to what may be defective. Either you are ready to move on to other usual suspects or ready to identify the area of defect - in but two minutes. Meanwhile, if computer boots, then immediately consult the system (event) logs where computer history is stored (as computer bypasses failures to keep working). If you don't know how to find these logs in Control Panel, then use Windows Help. Also locate and verify no hardware problems in Device Manager. Again, confirm what is working by collecting facts. wrote: My girlfriend's eMachines T2825 is experiencing the following problem. As soon as the PC is plugged into an outlet, the CPU fan spins up and the HDD light goes on and remains on, without me even touching the on/off switch. The power light does not go on, the computer does not POST, and the only way to get it to stop is to kill the power at the outlet. Several events led up to the current situation. Two days ago, in the morning, she let me know that the computer would not power up when she tried to turn it on. Before going to work, I only had time to check to make sure that the computer was plugged into a working outlet. That night, when I got home from work, I unplugged the PC, double checked that the outlet was live, and plugged the pc in again. When I pressed the power button, the computer started, but there was no output to the monitor, and no POST beeps. I had to hold in the power button for 5s to get it to shut down. After waiting, I tried the power button again. This time the computer booted normally (single beep on POST), but the mouse and kb were unresponsive. I replaced the PS/2 mouse with a usb one, which worked, but a few seconds later, windows shut down without warning. The power did not go off though (which I guess is due to power management settings in windows), and I had to again manually power down the computer. The next time I tried, the computer again successfully booted, this time the mouse and kb worked, but a couple minutes later the computer again shut down without warning. After again manually powering down, I gave it a rest for 20min or so, after switching off the surge protector. Ever since then, whenever the computer is connected to a live outlet, the HDD light comes on, CPU fan spins up, and computer otherwise acts dead. ... |
#8
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CPU fan runs as soon as PC plugged in.
wrote:
Rod Speed wrote: wrote: Hello, My girlfriend's eMachines T2825 is experiencing the following problem. As soon as the PC is plugged into an outlet, the CPU fan spins up and the HDD light goes on and remains on, without me even touching the on/off switch. The power light does not go on, the computer does not POST, and the only way to get it to stop is to kill the power at the outlet. Several events led up to the current situation. Two days ago, in the morning, she let me know that the computer would not power up when she tried to turn it on. Before going to work, I only had time to check to make sure that the computer was plugged into a working outlet. That night, when I got home from work, I unplugged the PC, double checked that the outlet was live, and plugged the pc in again. When I pressed the power button, the computer started, but there was no output to the monitor, and no POST beeps. I had to hold in the power button for 5s to get it to shut down. After waiting, I tried the power button again. This time the computer booted normally (single beep on POST), but the mouse and kb were unresponsive. I replaced the PS/2 mouse with a usb one, which worked, but a few seconds later, windows shut down without warning. The power did not go off though (which I guess is due to power management settings in windows), and I had to again manually power down the computer. The next time I tried, the computer again successfully booted, this time the mouse and kb worked, but a couple minutes later the computer again shut down without warning. After again manually powering down, I gave it a rest for 20min or so, after switching off the surge protector. Ever since then, whenever the computer is connected to a live outlet, the HDD light comes on, CPU fan spins up, and computer otherwise acts dead. No hardware changes have been made since the computer was purchased a few years ago, and I can't think of any other events that might be relevant. Any help or advise would be greatly appreciated, Looks like a bad power supply or bad motherboard or both given its an eMachines. The other thing Emachines kill is their processors. Hardly any computers kill chips, but emachines do, with a vengeance. Presumably they must stuff up the cpu Vcore. In fact, just count on replacing at least 2 of the following 4: Motherboard Power supply Processor RAM. (probably not) |
#9
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CPU fan runs as soon as PC plugged in.
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#10
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CPU fan runs as soon as PC plugged in.
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