I think this might work:
How-to-remove-and-re-attach-LCD-Ribbon-from-a-PCB
this is for the thin white horizontal ribbon. I've got nothing to lose so i might try it. if it works there might be a way to fix those pesky horizontal lines.

i might try this in a few days when i have more free time :-)

yep, that's correct. contrast pumped to max. i think i found a way to fix it see my next post.

i will try cleaning the corrosion. it is running off an AC adapter here.

Edit: that didn't work the screen is still messed up. i even tried the cpu board from my good dmg with this screen. same thing.

hello all, i need a little help here,
I recently picked up a broken DMG-01 from my local flea market. i bought it cheap because the batteries had leaked. anyways, i power it up and most of the display is not there. when i power it down sometimes the entire screen flashes black for a second then shuts off. what i am wondering is if there is any way to fix this. i tried the front PCB with my working game boy and same thing. any help is appreciated.
mods, if this is in the wrong section please move it.
thanks.