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Everything was good, but today when I turned on my laptop HP ProBook 4320s, power button, wifi button, hdd led and Screen - everything went from clear white to white-purple. Has anyone any ideas?

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The colors of all LEDs have changed? Not trying to insult you but I think its more likely that your perception is flawed. –  Baarn Sep 26 '12 at 8:30
Try to connect a monitor and see if the result is the same. It could be a lot of reasons, varying from hardware malfunction to wrong settings configuration... –  m4573r Sep 26 '12 at 10:37
Extra monitor has everything in nice colors. It is not my perception - everyone, I asked, told, that colors became more purple. –  MBentefor Sep 26 '12 at 15:35
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