?A1502/4924 graphic glitches

[vsa100]

Hi!

I have this A1502 with cracked lcd.
Changed it, but now i have random graphical glithches.
If i put external display with hdmi connection i don't have problems with both screens :/

What i can check?
Thanks

 

[JohnB8812]

Can you take a video or picture of the graphics glitches? This could of course be a CPU or RAM issue...

 

[vsa100]

Sure!
It starts with perfect image, and then after 2/3 seconds:





and then it gets worse:



Then if i connect hdmi external display i can use both normally.
I managed to install osx without problems, but day later started acting weird.

 

[JohnB8812]

That is very very likely a fucked CPU. RIP.

 

[vsa100]

Nice!
Can i test it somehow to be 100% sure?

 

[2informaticos]

Disconnect LCD and test external monitor, or test known good LCD; just in case.

 

[vsa100]

Damn, at the moment i don't have that exact model...(of LCD)
Disconnected LCD and tried with external, the image is always perfect!

 

[Inwerp]

why dont you use cracked lcd as a test screen? this glitch looks fat enough to be visible on the old screen as well.
whould be rather funny to know thats a firmware issue

 

[vsa100]

i'll do both (if necessary) and reply, thanks

 

[vsa100]

I'll add that if i boot from room temperature it works fine until i stress-test it and temps get higher!

 

[2informaticos]

Looks like CPU issue.
External video still OK then?
Is better to discard LCD in any case...

 

[vsa100]

External video ok, tried now with another lcd and have exact problems

 

[2informaticos]

Then LCD output of CPU is bad...

 

[vsa100]

...and no way to fix it i presume...

 

[JohnB8812]

Nope trash

 

[2informaticos]

Use it as iMac, with external monitor.
Or transform an old TV (with HDMI) to Smart TV...