Citizen calculator watch testing components advice

[Adam]

I have a citizen calculator watch that I stripped down to replace the crystal. It was working when I stripped it but when I put the case together I heard a crack and the lcd digits just faded away. Initially I thought I had cracked the board but after looking through the glass I can find no damage.
I know you guys are more used to LEDs but some advice on testing components on the board would be appreciated. I have a digital multimeter for testing.
When put back together only the the light now works.

Any help really appreciated as at the moment im gutted.

regards

Adam

[charger105]

Hi Adam.
I've never worked on one of these before, but if you heard a crack, it should be possible to see where it is.

Have you tried holding the board up to the light ?
What about the LCD display ? Perhaps the display has cracked (at the connection edge/s, where no 'bleed' would occur).

Rgds,
Andrew.

[Adam]

Thanks Andrew

Nothing I could see on either of those. I thought if I could check anything on the board I might have damaged, that I might be able to replace. I'm still gutted, i'd cleaned everything, stripped the buttons, dismantled the keyboard and even polished the front steel. I have now put all back together and put it in a drawer hoping it would come back to life, but nothing yet.


Adam

[retroleds]

I'm guessing you cracked the matrix somehow....bleed is so unpredictable. A lot of LCDs will sit there and not bleed at all if they are cracked in one motion - the glass is tightly together(quality build), the LC "blood" is intact and the air is not exactly forcing it's way in. A lot of bleed starts at an edge or in the center(in those early LCDs that were filled from a center point and have a plug on the back of the matrix). I'm thinking that bleed is more a function of the laminations separating and creating a vacuum which is then filled by either air or LC. Of course in the case of extreme heat(LCD on dash of hot car ), all bets are off on how a display might decide to prostate itself before the final act.