Damage LCD-DOT Matrix Display

thanks for your reply..

The condition of that conduit connection makes me wonder about water intrusion.

Take out the lcd from four white hooks at top, left and right as shown in your picture.Lcd must be flipped downward. Underneath resolder all the pads with fresh solder.

Have fun.

If above do not work, then try this.

Heat the glue holding the LCD's ribbon cable to PCB with a hot air gun (you can also use solder iron for heating ,but use a card board on the ribbon, so that it will not melt down ) and using a flat screw driver to re-attach segments of the ribbon cable to the PCB.

Have fun.

UV is really bad for LCD displays.......

Once its repaired, fit it with a hinged flap to keep it covered when not being looked at, that does not a) let UV through and b) is not itself UV sensitive.......

Problem solved.

i dont think this unit could have been frozen, since here in our country philippines, the weather is somewhat always warm, and in rainy season the temperature would only be around 25 deg. C

i looked at the operating condition on the manual and it says ambient to 60 deg. C, and the temperature if its summer season here in our country would only reach 36 deg. C at most, but maybe my guess is that at the unit would only around 40 deg. C or my assumption

I see little white tabs holding the LCD in place.

I would try to pop off the LCD and see if there was a zebra noodle (not the real name) stuck to the backside? I'll bet there is..

It would be positioned at the top or bottom and run the length of the display.

At a glance it will look like a gray plastic box shaped strip, but it's actually flexible. The strip is made up of a hundreds of tiny layers of conductive and non conductive materials, and it's only job is to be the conductor between the flat surface electrodes on the PCB and the ones on the back of the glass LCD display.

The connection between the LCD and the PCB has many signal paths that run through this noodle, but it relies on pressure to hold it in place, and luck to ensure it's continued operation.

To test if this is the case apply a little finger pressure land rub it back and forth across the top and bottom of the LCD. You might see that all or most of the display temporarily returns.

This is because you are creating a tighter bond and better connection to the possibly oxidized pads on the noodle.

If the display is hardwired, this won't be the case, but 90% of the time I can diagnose and fix and LCD display issue without so much as a little clean up and a tiny screwdriver.

It may or may not be recommended, but I've used whatever is available to give the PCB a little wipe down with a Q-tip and some electronics cleaner... or the edge of my shirt and some spit.

If you pop the noodle off, just stick it back onto conductors printed onto the glass on the back of the LCD. The hundreds of layers make positioning this strip easy.

More often than not just pulling the strip off and putting the display back a couple times will rough up the surface enough to restore the LCD.

In some cases the pressure on the LCD / noodle / PCB sandwich is too little.

putting a mini shim less than the the thickness of a credit card under the white tabs could alleviate this. (cut them from a water bottle)

good luck!

I think there may be a "Z axis" connector strip in there too:-

http://www.google.co.uk/#sclient=psy&hl=en&safe=active&q=%22Z+axis%22+connector&aq=0&aqi=g2g-v3&aql=&oq=&pbx=1&fp=55d8a019b4773848

as of now, i haven't done anything yet on the lcd, since im still contacting the manufacturer for any possible reason from their side of what have caused this and any parts replacement if possible, manufacturers local representative of that instrument already told us that replacement would be the only solution, but the cost would be so high since the replacement is the front board module where the lcd is attached.