The screen momentarily shows the windows desktop and then the green led by the on/off switch flashes yellow and the screen goes blank

Perform a Flash Light test as shown below LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Hello,

It is the picture picture board on your monitor that is malfunctioning, since the power led or button is on, but the display screen goes blank after a few seconds, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer within your vicinity or any service center to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

Usually when these develop a fault you will get flashing LED codes. If you are not getting any the power supply may have failed completely.

Try another cable and socket in the first instance and ensure the manual power switch feels normal in action.

You have a defective LCD screen that makes a short circuit (thats the flashing green led)
Mostly the upper LCD screen is the problem.
You cab replace the LCD screen by buying one (ebay) and use a manual found on youtube but you need to have the skills. If not, please find someone that can repair it for you

dmellman, Before you open it up, try this! With fully booted pc and WIN DESKTOP screen up, reconnect the L17AMTN . Have a bright flashlight handy so that when the lcd screen flashes on for 1 second and then goes dark, you will want to check to see if the desktop remains on the screen even though you think it went away. Shine the light 1-2 inches from screen at different angles. Has the desk top completely disappeared or is it still being displayed? Do you know about Cold-Cathode-Fluorescent tubes and their Inverter type power supply? I assume that this unit also has a "lay on floor black box switch-mode-power-supply" that is supposed to supply raw 12v-14v dc to the monitor? This symptom is typical of lcd monitor power supply failure, and or inverter board failure. Not to mention the fact that the CCFT's could be a bit tired from use. YOUTUBE has some videos on taking apart lcd monitors. also do search on web for "bad caps on lcd boards" or "bad caps in lcd monitors". I should think that this Tatung might suffer from swollen cap-itis. get back to me with results of your investigation. Im louie12fix on fixya or [email protected] just nrth of Windy City

It sounds to me that the monitors power supply is dying. I would replace it with a different monitor as soon as possible. I would consider this a dangerous situation, and a possible fire hazard.

Thanks for using FixYa,

Hope this helps,

Eric

the motiter to pc cable is problem yaar you change it the problem is solved

Have you tried it with an External monitor?

Throw it out the window. Acer sucks.

If the main power button LED is flashing or solid yellow, this could indicate a hardware problem.

 

Was it running good before?

 

Are the diagnostic LED lights all green?

 

Here is what dell says:

 

If the power light is blinking amber  —

 The computer is receiving electrical power, but an internal power problem might exist.

• Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
• Ensure that the processor power cable is securely connected to the system board.

Do you remember what the BSOD said?