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Re: computer turns on automatically when i plug in the...
250 w is a rather low wattage power supply. That's one thing I would change if you have spare parts available. Here is what I would try: Remove the memory and blow the dust out of the system. If you have more than one memory chip, put only one in and attempt to reboot. If that does not work, swap memory chips and try again.
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- 1 unplug the power cord from the computer, hold the power button for 10 seconds, plug it back in and power up the computer. (go to item 2 if this fails to solve problem)
- 2 power on the computer and listen for a beep sound at least one time (if no beep sound, then you have no post meaning a bad BIOS or a broken Motherboard) - (if this is the case replace motherboard else Move to Item 3 if N/A)
- 3 Power on the computer and make sure that the Power Supply fan is spinning ( if not then replace power supply) - ( move to item 4 if N/A)
- 4 If when powering on the PC you have a POST / beeps but no Video then count the amount of beeps ( shorts and longs beeps) in the same order the hear them, go to you pc manufacture and in the support section look for specs and find what bios chip it has, then go to google and look for your Bios Post Beep Code Errors
- you may find a defective / broken video card or bad RAM / Memory
This is a fix that worked for me, however I cannot tell you why or even feel that I had done anything which would constitue this as a fix. I leave my PC on 24-7 and came in one morning and it was locked up. Couldn't get a video screen, not even reset worked so I threw the power switch on the back of the power supply. Turned the switch back on and pushed the power up button. The MoBo started 1 long and 2 short beeps, repeating. I pushed the reset button and same thing. I again turned the power supply off, then on again and same thing with the beeps. So this time I turned the power supply off then also un-plugged the power cord to the power supply. I left it that way for maybe 10 minutes, while I did a few other things. I plugged the power cord back in, turned the power supply back on and hit the power up button. My PC booted up...no problem. ???
Point is - this issue as reported by others may just be a hardware or bios fluke and needs a power reset or maybe even clearing the bios and restarting. Reseating the memory sticks, use just one memory stick and rotate the memory sticks to sort out the possible bad one and reseating the processor may also help.
You have to have ram memory in, for the computer to operate at a basic function. To get to the BIOS POST screen.
NOTE* When changing out hardware do you have the power disconnected from the computer? Yes, I know, but I have to ask.
Also, do you follow anti-static precautions before sticking your hands inside the computer? Touch the metal frame of the open computer case before reaching inside?
Your body carries Static electricity. Static can fry out the hardware components inside your computer. Especially the Processor, which is the most susceptible hardware component to static shock.
1) Computer unplugged from power. Video card removed. Monitor plugged into VGA port on the motherboard. Ram Memory installed. Harddrive data (Interface) cable disconnected, and power cable. Same for any optical drive/s.
Press the Power On button in, and hold it in for a count of Five seconds. Let go. Do this procedure 2 more times.
What you are doing is clearing CMOS Error Codes, and resetting BIOS Setup back to the factory default settings.
Plug back into power. Wait 1 minute. Turn the computer on.
Do you get the BIOS POST screen? Let's start from here.
Sounds like motherboard is not getting correct power. Could be as simple as installing a new power supply ( try tigerdirect.com for supply) or it could be as disheartening as a cracked motherboard. These are tricky problems, does your computer beep at all during startup? If it does find out the manufacturer of your bios, and look up the beep codes for that brand. Every bios has different beep codes that could be trying to tell you something.
I went to google and it seems like the beeps can be problems for different problems in the hardware, this is what one message says, there are lots of computer beeping answers out there:
1 short beep is your BIOS saying "HELLO I'M OK"
Standard Original IBM POST Error Codes
1 short beep Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps keyboard card
Each BIOS company has modified these codes over the years.
This is typical when the motherboard (CMOS/BIOS) is having a difficult time auto detecting the devices installed including drives, videocard, sound card, network, etc.
Initially set your CMOS/BIOS to default/fail-safe settings, save & exit. Perhaps you can try running with the barest of add-on devices as you have posted initially, but do it one step further, remove everything including that one last HD (with the correct jumper settings). If you have onboard video use that one rather than an AGP or PCI-E add-on. Run the unit with just a single memory. No cables other than power and front panel. Thereafter connect your devices one by one and try every time a new one is added. This include removing any USB devices/cables plugged in.
More often it is an add-on that causes freezing at this point as you have described. You may also venture in trying to flash your BIOS (however pls be forewarned of possible difficulty/failure when doing so).
Hope this be of some help/idea. post back how things turned up or should you need further information.
Good luck and kind regards.