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Sony Ericsson / Sony : General : W800 blank screen and K750 no backlight
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Mulder7 Posts: 221

Ok I found out from my friend that my K750i backlight isnt working because he dropped the phone. I was told that maybe the keypad and the connectors arnt touching the main board properly and this is preventing the backlight from working but I have tryed a new keypad and the backlight still didnt work.

Does anybody have any fresh ideas to what might have come loose?
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Posted: 2006-09-18 11:12:21
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Sammy_boy Posts: > 500

Did you try my trick on the W800i, the K750i or both?

If it was just the K750i, try it on the W800i, it might work on that
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Posted: 2006-09-18 12:45:31
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Mulder7 Posts: 221

The w800 has more of a problem as it just wont start up now for some reason and just a backlight problem on my K750. I tryed the trick on them both and neither worked.

The keypad on the K750 is disjointed, the black panel comes away from the rest of the keypad but not fully, its still atached somehwere. This might be the problem but not fully sure.
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Posted: 2006-09-18 13:00:54
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Sammy_boy Posts: > 500

Try swapping the mainboards (PCBs) over ONLY in each phone so that the k750's pcb is in the w800 and vice versa. See if that makes any difference at all with a totally different lcd keypad, etc.
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Posted: 2006-09-18 13:24:30
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Mulder7 Posts: 221

Ok swopped the main boards over just and the following happened:

K750 still had no backlight and W800 light up but did not start or vibrate which suggests that the backlight problem is on the main board somewhere. I dont know why it all works but when my mate dropped it, something broke, but I dont know what.

If anybody knows how a K750 screen lights up, your help would be appreciated.
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Posted: 2006-09-18 15:02:54
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Sammy_boy Posts: > 500

Sounds like the W800i needs reflashing, and yes, I suspect the K750i has a problem somewhere with the connector. I wonder if a pin or one of the tiny connectors on the connector (if you know what I mean) has been damaged/bent/snapped or something.

It sounds like your best bet is to sell the pair of them on and get another phone. I'd say both screens would be OK, so they should go for a good few quid for spares at least, or if somoene is able to repair them.
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Posted: 2006-09-18 15:45:50
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Mulder7 Posts: 221

Yup am trying to sell them on. My thread is in the sales section if anyone is interested.
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Posted: 2006-09-18 15:48:26
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frequency8 Posts: 21

..good luck on selling ur phone! better sell and get new 1.
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Posted: 2006-09-19 06:06:31
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andipunk Posts: 2

thank's.......................
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Posted: 2009-05-17 20:16:38
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pt020 Posts: > 500

this summer it is 4 years that i got my W800i and it was the best phone SE ever made.
even that i have the P1i too i still love the old one and the sound of music is better then my friends W902
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Posted: 2009-05-18 10:14:10
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