Monitor says no signal when turned on

"No signal found" is a generic display from a monitor that is not receiving a signal from the input cable. Your tower, however, may or may not be functioning. If you have another source to connect the monitor to (laptop or other PC) you can try that. Most monitors have a "menu" button. You could press that to see if a menu is displayed on the monitor, That will indicate that the monitor is working as a stand-alone. It will also indicate which input source is being used. If the input source is incorrect, then no signal is being received from the incorrect source. As far as the tower is concerned, the are a myriad of causes for no signal to the monitor. It could be unbootable due to a hardware failure at the mainboard level or the power supply. If you hear a single beep then the main board has passed it's diagnostic testing successfully (memory is ok, chips and CPU are ok). If you hear more than a single beep, the main board is having a problem. If a single beep occurs, them most likely it is the graphics controller. any other failure would be displayed on the monitor. If the graphics controller is on the main board, then you will need to install a new graphics card, bypassing the main board's controller. Was this a working system at one time?

1)check weather the ram is properly installed on board or not
or reconnect it

2) or clean the ram with eraser n check it out

3) if still its not working den remove the ram from board n switch on the pc n check for beeps if u r getting beeps then motherboard is ok n ram has problem den replace the ram

Hello,
As mentioned that when you turn on the system the lights on the system turns on and the monitor goes off, unplug the VGA cable from the system tower and turn on the monitor and check if you get signals on the screen if it shows you some color bar or a massage, that means your monitor is good. IF not then there is problem with the monitor . get it repaired or replace it. If that is not the case you would need to unplug all the external devices connected to the tower and try, IF not then you need to open the tower and check for the green light on the motherboard if it comes on or you can try reseting the memory card or if you have an video card, then you will have to remove the card and try the build in one .
Regards
Samson ved

Look at http://www.computerhope.com/beep.htm the answer is in the beeps for your motherboard.

sounds like your video card is eather bad or dont support that monitor try another monitor or replace the video card with a new nvidea card

hi,
please write your beep description

ex: one long beep two short beep

repeating short beep

three things can be the issue here:

1. No signal from the tower (VIDEO CARD)
2. Bad cable or bent pin on the d-sub 9-15 pin vga connector.
3. Bad signal board inside the monitor itself.

Things to try:

1. another computer.
2. check the signal cable for bent pins.
3. check the video card in the tower.

Before you "think its a bad monitor" you always want to assume the computer first as computers are 9 times out of 10 why the monitor is not coming on such as BIOS errors, Bad video card, bad power supply etc etc.

PLEASE BE CONSIDERATE! When rating and leaving positive feedback for your free answer today.

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if ur monitor is not coming up... check uplugging the monitor cable from the tower.... if u receive a msg on screen "No input signal" or "No VGA Signal" then Monitor is working fine... if not received monitor is not working properly.

if Monitor working... open the tower and remove memory (RAM) and switch on the pc... u should get beep codes.. if u dint get it.... Motherboard gone bad....else... try inserting RAM in other slot... even then its not lighting up...RAM problem or RAM solt problem..

The beeps are probably BIOS beep error codes. Through a series of long and short beeps the computer communicates computer problems that occur early in the startup processes. It's likely the problem isn't your monitor but something in your computer box itself. If you can tell us what the pattern is we can start diagnosing your problem. We'll also need to know the manufacturers name, the specific model computer you have and what operating system you are running.