The only lights that come on are one green one on the motherboard and the one on the power button. The four little lights on the back do not come on, no fan, nothing. Would this be the power supply, motherboard, or something else?
Easy check is: power the system off. Unplug the power supply from the outlet. Hold the power on button in for at least 10 seconds. Remove the CMOS battery. Reconnect the power supply to power. Attempt to power up. See what happens. If it comes up and asks for you to set config, power down, unplug the power supply and hold the power on button for 10 secs. Replace the CMOS battery with a new one (CR2032 button battery...about $5 for 2 in the Wal-Mart photo dept) and power on. The reason for the repetition is to reset the BIOS.
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Did you open the case on your computer? It may have an open case alarm which is a small switch typically located near the edge of the cover you removed. Make sure the case cover is completely installed, then see if the alarm goes off.
Does the fan on the power supply run? As you say the power on switch lights up and so does the motherboard, means that the power supply is working. Monitor gets power from the socket on the power supply. Try plugging it in the wall socket. Try to unplug the main power cord from power supply to the motherboard. The one that has a broad plug at the motherboard end. Replug it and they power on the PC.
Power supply has several voltages. Just because the 5v power is active doesn't mean all the voltages are OK. You need to have the power supply tested for 12v and 3.3v. A quick test is to unplug all the wires from the power supply. There is a single green wire on the motherboard main plug. Connect (use a bent paper clip) that green switch wire and any black wire. Plug in the power supply and it should run (fan starts)
HI...the motherboard of your computer has a BIOS which needs to be reset. By resetting:
1. Turn off the computer and unplug the power cord
2. remove the button battery(CR2032) on the motherboard
3. right next to the battery has a jumper
4. move the jumper over by one pin and wait 10 seconds.
5. move back the jumper and put in the battery
6. finally, power up the computer
make sure you hook everything with a little force especially the memory until it snaps back into place. same goes for all the cards. care should be give to the cpu, nice and easy. make sure your power supply is potential enough or has not gone bad. The MB can give a green light but there could be too little energy for the whole system.
1. Remove all USB devices such as printers, mp3 players etc etc.
2. Remove the power-cable and the battery
3. Press and hold the power button for 30 seconds
4. Put the power-cable back in but not the battery and none the USB devices.
5. Turn the computer on
Best way to check is to open your case. Near the power supply plug to the motherboard should be a little led light. If it is getting power to the board this light should be green. If it's unlit then most likely your power supply has gone bad. Hope this helps.
inside the pc there should be a green light. called flea light. if its not on.. then id say motherboard or power supply are bad. take power cord off. and hold power button down for 10 ecs. then reconnect and retry. i think its abad psu.
This is an easy fix so here you go nice and simple:
Problem: Your motherboard circuit has been cut.
Causes: Power disconnected during operation. Power outage or short in the surge protector.
Symptoms: Flashing green light on both motherboard and power supply. System will not power on.
Step 1: Ensure that both the power supply and the motherboard lights are flashing green, not solid or off.
Step 2: While the power is on, disconnect the power supply from the motherboard. This connection is the largest of the connections and should be listed as the 'P1' or 'Primary' power connection.
Step 3: Wait until the green light on the motherboard stops flashing and check to ensure that the green light on the power supply is now solid. If it is not solid, disconnect the power to the power supply and wait until the light turns off completely. Then reconnect, it should be solid now.
Step 4: While the power is on, reconnect the P1 connection to the motherboard and you should now see that the light on the motherboard is solid.
Step 5: Power on your PC. The problem should not persist.
Warnings: If the power supply light remains flashing after you have restored power to it while it is disconnected from the motherboard, it may be a system failure in the power supply itself requiring replacement. Always be careful when working with an active or live power machine.