Screen pink at BIOS, then fine, then about 5 minutes later it goes black or dark

We have multiple IBM T40 laptops that have this symptom with the screen:
Multiple IBM t40 screens do this: Start pink at BIOS, then fine, then about 5 minutes later screen goes black or dark
Anybody know what part is responsible for this failure.
It seems fairly common on Google, so I would assume lenovo support has heard about it a lot and probably has some info.

rhyous, welcome to the forum,
I hope I am wrong, but what you are describing sounds very much to me as when the inverter or CCFLs (backlights) are failing. The clue is that they "start pink" which is indicative of this. If this is the case the options are limited.
Have a look in ThinkWiki at this page
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Screen pink at BIOS, then fine, then about 5 minutes later it goes black or dark

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