vertical lines on lcd after replacing backlight

[radiolite22]

Hi, need some help or advise here...

Recenty I tried to replace the backlight of my sy99.

followed Christopher Baxter's guide as I couldn't get the old backlight out.

After reassembled everything and powered on, the light works but the lcd dot matrix are only half readable. There are a few vertical lines on the lcd.

http://i841.photobucket.com/albums/zz33 ... 182618.jpg



http://i841.photobucket.com/albums/zz33 ... 182546.jpg



The lcd was working fine and all wordings are clear. Was just pretty dim so I wanted to replace the back light.

So I thought I may have reassembled the lcd wrongly and dismantled everything again, fixed back and now it seems worst. More vertical lines. .. Now it is hardly readable.

Lcd reading was working fine prior to replacing the backlight so I dun think it's faulty.

Anyone can help?

[shadowmask]

Hi,

This kind of thing happens when the conductive rubber strip between the LCD and PCB is out of place / dirty / not enough pressure on it.

The two pictures at the top of this page show what I'm talking about..
http://www.fujipoly.com/usa/design-guidelines/89.html

Maybe it just needs a clean with alcohol and re-seated. I feel your pain - the LCD is the most time consuming component to get at.

Brian

[radiolite22]

Hi,

This kind of thing happens when the conductive rubber strip between the LCD and PCB is out of place / dirty / not enough pressure on it.

The two pictures at the top of this page show what I'm talking about..
http://www.fujipoly.com/usa/design-guidelines/89.html

Maybe it just needs a clean with alcohol and re-seated. I feel your pain - the LCD is the most time consuming component to get at.

Brian

Thanks Brian for the info.

I may have to give it another try and dismantle everything the 3rd time... really a nightmare with all the "screwing" around!!

Will alcohol be sufficient or might contact cleaner be a better choice?

Probably need advise on how to how the pcb board tightly onto the rubber strips..