No signal on monitor

Monitor is connected (power and signal), turned on?

The symptoms you described is common in fault mobo or VGA card.But VGA doesn,t turn bad so easy.I suggest to change your mobo first.

If you need more help post back!
Thumbs and testimonial are welcome!

If your monitor displays No Signal, it means there is no video signal coming from the computer. Monitor is working fine.

It may just be the monitor cable. Do you have another one, or one you can borrow from another computer, for a test?

If a known, good, working, monitor cable yields the same results, the problem is your computer.
The computer isn't working.

The problem may be due to the power supply. Most of the time it is.

This statement is given because of,
A) Most of the computers that come to my shop, have this problem.
B) If you look on the internet, it is a common problem stated.
C) Most of the problems on here, are due to power supply issues with the computer.

You may see, or hear fans spin. Lights light, and it may sound like the harddrive is running.
Problem is, the processor doesn't have enough power to operate, so nothing is going to get done.

The main rating for power of a power supply is Watts.
Voltage times Amperage = Watts.

1) ALL the lights use less than 1 Watt

2) EACH fan uses 2 to 3 Watts

3) A typical Processor uses 55 to 125 Watts.
Depends on what processor it is.

The power supply has 3 main voltage power rails.
A) The 3.3 Volt rail
B) The 5 Volt rail
C) The 12 Volt rail

If the power supply develops a weak, or failed voltage rail, the Processor does not get enough power. Won't turn on.

Most of the time a power supply fails because it is dirty inside. (And the inside of the computer)

The simple solution is to unplug the computer from power, open the computer case, and use a can of compressed air for computers, on a regular basis.

Install the plastic 'straw' into the nozzle, and shoot air into the inside of the computer in rows.

Start at the top inside part of the computer, going from one side, towards the other side.
Then go down towards the bottom.

Tip the case slightly with one hand, and use the other hand to shoot air towards the bottom, to remove the remaining dust/dirt.

Shoot air into the power supply, from the back of the power supply through the ventilation holes. (Inside of computer)

Use a few Q-tips, and clean the fan blades, center hub, and surrounding cage, of the power supply fan, then use air. (Back of computer)

The rest of the time the fault lies in bad Electrolytic Capacitors inside the power supply.

CAUTION!!
NEVER open a computer power supply!

The Electrolytic Capacitors inside, hold a charge for Weeks, sometimes Months, after the power supply has been unhooked from power!

You can get shocked Badly, or even Fatally!
Best solution is to replace the power supply. If you have another working power supply, you could use it for a test.

[Be sure to work on a table. Be SURE to touch the metal frame of the computer case, (Case open),
BEFORE you reach inside!
(Computer UNPLUGGED from power)

Your body carried Static electricity. Static can fry out computer hardware components, in a New York second!
Computer unplugged from power you're safe.
Touch the metal frame before reaching inside, the computer is safe.

If you get up for any reason, leave, then return, touch the metal frame again!]

if its a flashing amber check power connection.

unplug the ram & cleane the ram and then try again

Green light indicates the monitor is getting power. Nothing coming up on the screen indicates, No Signal.

No signal from the computer. This means the computer itself isn't working.

A bad power supply in the computer can cause this. A bad power supply is the leading cause of desktop computer failure. It is replaceable, and can be done by the owner relatively easy.

You may have a computer tower that the Power light comes on, you hear fan/s spinning, (Including the Power Supply fan), and it sounds like the harddrive is running.

ALL the lights in your computer use less than 1 Watt.
EACH fan uses 2 to 3 Watts.
A harddrive sitting there spinning in an endless loop, consumes about 2 to 3 Watts.

A Processor uses 51 to 125 Watts. Depends on what Processor it is.

A weak Power Supply will have enough power for lights, fans, and that harddrive sitting there spinning.
It won't have enough power to turn on the Processor.

[No processor operating, then the harddrive sits there spinning in an endless loop, because there is no processor to find the boot sector]

For a test, connect your monitor to a know good computer. See if it works.
Now connect that other monitor to your computer.

Hello,
take the PSU (Power Supply Unit) from a known working computer, preferable to be the same model and test with it. when you do so make sure you disconnect any peripherals e.g ( Printer, CD-ROM, Floppy).

Look closely at the memory bay for any bent pins, and test with one memory at the time.

Let me know if this is still an issue.

Regards

no signal indicates a couple things... i suspect your computer isn't even booting up. reboot the computer while tapping the F8 key.... you should see writing on the screen... boot to safe mode. after it sucessfully boots up... reboot again... should be fine.

Robert

also is that an add on video card ?

The PSU dying may have destroyed the motherboard also. Try removing all interface cards and disconnecting all drives to make sure.

I have the same problem, the CPU fan spins, keyboard lights blink, no start up screen, or bios.
But, when I push a few times on the pc reset button, then the CPU fan is becoming still, the keyboard light are out and I can start the computer again in a normal way.
Can this one be a temporally solution for you too? Do you have any suggestion about?
I guess it can be an electricity dysfunction of a wrong fixed cable.