Display has gone very dim

A couple of days ago, I left the dashboard on for a few hours because I was monitoring the weather conditions. I then turned off the dashboard, but the screen did not return to its normal brightness level. I cranked the brightness all the way to the top, just to get it to somewhere near the proper level -- however, it is still a bit on the dark side.
I have tried rebooting, but that didn't help.
This computer is about 8 months old.

Dear Neara,
likely to be some part of the backlight assembly, but could be the screen. Parts are available in the UK, but of course you will also pay for disassembly and fitting (at a guess £200-300 all in). Its worth plugging in an external display, if this works fine then it is probably the backlight. there are a number of "spares or repair" PB's on ebay, they don't sell for much. My PB is in the same state at the moment!
bw
Andrew

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Attachments:
tvcircuit.jpg ‏2994 KB

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thanks both for the repliy
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