4001 no display

[_Phat_]

My mate the plumber got himself a 4001N with no card, so I pop in the LED simm and after a bit of fiddling the box reveals it's secrets.
I remove the bridges ( I have a crap LED simm with a red button) clap the thing back together program him a fun and fire it up.
Horror! display wouldn't come on at first then when it did it came up all 88:88 (flickering) and now when plugged in nothing .
I have tried reflowing the atmels and replacing the top223y and the smd cap next to it, but nothing.
Is there a specific area to check for voltages/resistance etc.

any help greatly appreciated.

 

[teg]

have you tried wiggling the ribbon cable its a bugger to get out sometimes and can get damaged . think thats something to do with the led display

 

[_Phat_]

It's been in and out so many times it must be wiggled and woggled!, no seriously I have tried different displays from working boxes too but to no avail

 

[Teeny]

i'm not 100% sure on this one mate, but from what i know, it's usually the 2000 that have the 88:88 problem, rather than the 4001...from what i've been told in the past relating to this problem is, they are a bit hit and miss, leave it a while and switch it back on again and just keep trying this, usually they fire up in the end.....Ooooo, i mean boot up, if u get me drift, but if anyone knows any diferent, then please solve this problem....lol

 

[chookey]

You have to check for solder bridges mate. You linked various parts of the board when using the ledsimm and it seems highly likely that a solder splash has occurred.

Chookey

 

[_Phat_]

Still no luck, been right the way over it with my big magnifying glass, mini wire brush and fibreglass pencil even resoldered the connections I had to attach to for the Led Simm nothing