Date: Mon, 20 Aug 2001 16:12:29 -0700
From: =?iso-8859-1?Q?=B7TechnoDragon=B7?= <[EMAIL PROTECTED]>
Subject: Re: Replacing 70CT LCD
>> Right after buying it as I was heading home, the screen flickered a
>>bit, and then went solid white.
>
>White! Seems to me the lamps Neil mentioned obviously weren't an issue
>with you. But your screen flickered first too huh? I guess if a chip
>fried, it could leave the screen bin either a lit, or unlit state (hmm...
>unlit, is that a word?). So I could have that problem.
My flickering was like one second long. I looked away and saw the
screen flicker out of the corner of my eye, seemed to change different
colors. I then looked to see what happened, and the screen was solid lit
white. The backlight was fine, as in a dark room it would nicely light up
the whole room.
>>Upon disassembly of the display to examine
>>the screen to see if it was a loose connector, I found a chip on the back
>>of the display had a nice little black crusty crater in the back of it.
>
>I'll look for this.
In extreme cases, it'll be all burnt out like that. Manufacturing a
chip to be perfect is impossible, they can only make it to be good enough.
They extensively test the chips in the factory before installation, but
even if a chip passes a test, that doesn't mean it'll last, it could fail a
few weeks after rolling out. That's probably what happened, it just
generated too much internal heat and popped itself.
>> I fear you may have the same problem, a dead chip on the back of the
>>display, or just a loose connector if it's black picture, perhaps a broken
>>ribbon cable. If so, it'll be a very cheap fix, but not necessarily easy.
>
>Wouldn't think a loose or damaged ribbon would cause the screen to flicker
>before it went out, but it's a possibilty.
It could as the broken traces contacted, then lost contact, and then
made contact again. You may not even see the crack on the cable upon a
close examination, only a multimeter will reveal the damage.
>I'm still wondering if there's anything I should be looking for that would
>indictate that some previous modification may have caused the LDC to go
>out. Sure don't want to put my old LCD into the unit and then have it go
>out too.
Putting the old one in would prove that it's either the lcd itself,
or something else in the system that's having problems. It's worth
trying,and you can leave it open for future repairs.
Just an idea.
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/ [EMAIL PROTECTED] http://broker.dhs.org/~tdragon/ /
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