PB 540 with dark corners on the screen

Hello, after being turned on for about 20-30 minutes the corners on the screen gets darker and darker. The computer has not been turned on for atleast a year but seems otherwise to work ok.
What causes this problem ? At startup all is ok = screen is normal.
Thanks for any tip I can get / Hans

iMacIntel + iMacG3/600 MHz, Mac OS X (10.5.7), SE/30, PB 540, LC III and Quarda 700

Posted on Aug 4, 2009 9:15 AM

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PB 540 with dark corners on the screen

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