My Old intel iMac screen broken???

[Retroworldnews]

As usual I used this old intel iMac for streaming music. I always put to sleep the screen. Suddenly I cannot wake up the screen but the music still playing.

I turn off the main power and see , the screen actually show the Apple logo and loading but later back to black out.

 

[Bigwaff]

Without any details regarding your iMac model, it's likely failed GPU or backlight. Take flashlight and shine onto display, can you see image of desktop? Otherwise, it's the GPU. Again, w/out any details of iMac model, it's really tough to give advice.

 

[Retroworldnews]

Without any details regarding your iMac model, it's likely failed GPU or backlight. Take flashlight and shine onto display, can you see image of desktop? Otherwise, it's the GPU. Again, w/out any details of iMac model, it's really tough to give advice.

Sorry for as I never input much details. This is Weird. Lucky my old intel seem working back. I turn off the main power again it seem back to normal. I feel is this old intel getting slow in the sense slow to wake up. Perhaps just now it seem cannot wake up respond.

I never update to latest OSX because I know once install it will be worst. One thing I noticed now the turn up chime seem gone weird..

 

[Retroworldnews]

OMG ... So what wrong? I test again it cannot wake up the screen whereas I still can listen the streaming radio. I always turn off the screen and it only play streaming music. Now is the screen cannot display out. Sorry for my poor written english hope you guys know what I mean.