Imac 27'' MC510LL/A mid 2010

[KingsRock]

Hello,
I am running IMac 27'' mid 2010.
Recently I have changed HDD to SSD Crucial 500GB following recommendations from IFixit. IMac is running on Windows 10. From the moment of SSD upgrade, Display's backlight started to radomly switch off with no chance to take it back to the living. Sometimes it is not starting after restart meaning, intializing display appears and when the windows sign displays the backlight goes down.
I have already do some tidying up inside, cleaning fans from the dust as well as the whole interior. Thermal sensors for lcd and SSD are good, no turbo cyclone heard or seen.
Any suggestions what does it might be??

 

[velocityg4]

Check it in macOS. Could just be that Windows is doing the wrong refresh rate or resolution.

Also if you are getting the dreaded black screen at boot. It’s usually just Windows working on something. Which will resolve itself if you give it time. This can take 15 minutes to several hours. I just tell clients calling about this to just let it run overnight. Nine time out of ten it’ll resolve the issue itself. Then return to normal boot behavior.