[Noisebridge-discuss] how does one debug an lcd screen?

[Zach .]

vaction? where?  I wanna go :)



thanks for the introduction brian.  Ive fixed a few LCDs at NB and
while Im definitely not an expert at it I feel like I do have the hang
of it and could probably point you in the right direction.  For
starters, the cap in the far bottom left looks bad.  



Bring it by on Monday and I can probably take a look at it.  I might even be
over there tonight.  I don't offer free repairs but I like to teach and
impart what I've learned.  So if you want to learn how to fix I'd be
glad to help.

best,

zach

--- On Sun, 5/1/11, Brian Morris <cymraegish at gmail.com> wrote:

From: Brian Morris <cymraegish at gmail.com>
Subject: Re: [Noisebridge-discuss] how does one debug an lcd screen?
To: noisebridge-discuss at lists.noisebridge.net
Date: Sunday, May 1, 2011, 1:11 AM

Zach is the monitor wizard who fixed a bunch of them recently.
I think he is away on vacation, but you could ask him for help.

Brian


On Sat, Apr 30, 2011 at 2:49 PM, Mike Schachter <mike at mindmech.com> wrote:

I'm working under the assumption that the power supply

is busted, so I took the thing apart and pulled out the

board where the power plug goes. This is what it looks

like:



http://imgur.com/a/pbpea#2spwh



I'm not quite sure how to proceed. There's a bunch of

capacitors everywhere. To my inexperienced eye, nothing

looks all that exploded... Should I just take a voltmeter

and measure the resistance of each end of the capacitors?



If one of the capacitors was messed up, would the resistance

be infinite? I'm kind of at a loss because none of this involves

probability distributions, calculus or computing derivatives. The

board doesn't have any equations on it!?! Maybe I could bring

it into circuit hacking Monday?



  mike





On Fri, Apr 29, 2011 at 8:53 PM, Mike Schachter <mike at mindmech.com> wrote:

> Hi there,

>

> So, I'm not the most knowledgeable person on earth when

> it comes to electronics... I took an electronics class once,

> and passed it...

>

> I have an LCD screen, a Westinghouse. Kind of like a TV

> or something. From years ago. It failed on me - it sorta

> powers on, but nothing shows up on the monitor.

>

> Sometimes the ON light just flashes, gradually fading softly

> into the quiet night. It makes me kind of sad. Sometimes I

> wonder if I can bury it in an LCD screen cemetery; would it

> come back to life, only to eviscerate it's hapless owner? My

> final screams should rightfully go unanswered, having toyed

> with things that unknowing humans should not. I'd like to

> avoid that. At least for now.

>

> So... does anyone know how to debug problems with LCD screens?

>

>  mike

>

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