Intermittent black screen or loss of video TS4088 Options with no warranty

I did that before already but I still had panics, even with automatic switching disabled.

Now I installed gfxCardStatus which will always show me which graphics are used and the possibility to either only use one or the other. Perhaps that will give me some more information.

But after having like 10 panics in a row this morning the macbook is now running smooth for like 8 hours, while working with an external display and using VLC ( which require "high performance graphics" according to gfx..)

So perhaps this program will give me some more insight into what I can do and how it could possibly be repaired.

But these panics really seem totally random so far. The only constant I see is, that when starting the macbook after it was turned off for a while, I will have a few panics at least, but once it´s over that I might be running quiet a long time without any problems.

Somehow that seems similar like a car I had, where there was a loose contact which was fine when hot, but always stalled the car when the metal had not expanded enough.

Perhaps there is some way for a diy repair!

That the replacement part may well be defective too, is probably very true and so any repair, that cost money doesn´t make sense.

I couldn´t find information anywhere, what the real cause of the problem with the logic board is. My last hope for an diy repair would only have been that, there just a little loose contact between the logic board and the graphics card. So that perhaps you could apply preasure at a certain part of the graphis card or the logic board to prevent that loose contact from happening. But I have no idea if that even makes sense!

For the time beeing I unplugged my external display and use that gfxCardStatus to stay in integrated Mode only! That really works! But it should only be temporary.