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Disconnect all cables from the computer. Press and hold down the power button for about 20 seconds. Reconnect only the power cable and try to turn on the computer on pressing the power button If it turns on then good otherwise, switch the power cable of the computer with the power cable of the monitor as they are the same cable as the power cable could be bad but this rarely happens. Open the computer and see if you see any light on the motherboard, if you do then the power supply is bad. If you dont then both power supply and the motherboard could be bad.
Hello,have you installed new motherboard or CPU? Follow these steps again 1) Disconnect the power cord from the back of the
computer & open up the case.
2) Wear an anti-static glove or
at very least discharge your static by touching a metal surface or power supply
Disconnect the main 20pin ATX power connector from the motherboard
& the square 4pin ATX2 power connector
4) Remove any PCI
cards you have & disconnect ALL drive cabling from the MOTHERBOARD.
Also disconnect any internal USB fly leads from the motherboard.
You should now have ONLY the cpu+heatsink/fan, memory & video card
installed. Locate the round silver battery in the bottom right corner of
the board. Just below it, you'll see a plastic jumper cap. This cap
should be covering 2 pins (pins 1 + 2) with pin 3 bare. It will be
marked JP1. Move the jumper to cover pins 2-3 instead. Leave in this
position for about 30 seconds, then return the jumper to its original
position (pins 1-2).
6) Reconnect the square 4pin ATX2 power
connector & the main 20 pin ATX power connector. Make sure that the
case speaker or buzzer is connected also.
7) Make sure the only
external devices connected are the keyboard/mouse & monitor.
Reconnect the power lead & power on the system
Disconnect the Power cable / A/c adapter/Battery from computer.
Disconnect External peripherials.
Hold down the power button on the computer for 10 seconds.
Reconnect the power cable or A/c adapter and battery or the computer
Try to turn on the computer
check for Led's on the computer
If still no display ,shut down the computer,disconnect power cable.
Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
Connect power cable and turn on the computer.
If computer turns on possible issue with one of PCI or PCI express card.
If still unable to power on.Disconnect the power connector pin from the motherboard and reconnect it back.Turn on the computer check power power led on motherboard,also check if the processor fan is spinning. if no go then issue with motherboard. GOOD Luck.!!
Hi, good day sir, there are several things you should do first.
1. Disconnect all connections to the motherboard.
2. make sure that your Power Supply 4pin 12volt molex and 24 pin molex connectors are tightly plug.
3. Clean the memory port from any dust, plug the RAM module, make sure also the module connector is clean.
4. Plug in the speaker and power switch.
5. Connect a VGA monitor.
6. Reset bios/cmos or simply operate the pc without the battery.
7. Plug the Power Supply to AC mains.
8. test the PC.
9. do this several times if you cant start the PC.
10. if every thing is OK, reconnect your PC and peripherals one at a time.
Hope this helps.keep me inform about your progress. thanks
Pin arrangment is Industry Standard Architecture.....
pwr led pwr sw N/C
X X X X O
X X X X O
hdd rst N/C
translated this is top row left to right ...... power led, power switch no connection
Bottom row is left to right........ hard drive, reset, no connection
Note: not all computer cases have a reset button, also the connectors for power led and hard drive produce a light, if the light does not show, power off the pc swithc the cable rooun 180deg on the connector pins and reconnect.
The power switch/button may have a polarity issue. Remove the power cable from the back of the PC, then swap the power switch connector on the motherboard 180 degrees (put the connector with the two different color wires back in the opposite way it was on).