68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.
Macintosh LC adb port out of order HELP!
Posted by: macalle69 on 2015-10-15 14:48:08
Hi Guys

i have recently restored an LC , apparently working , starts , boots sounds but ADB port does not work, i have recapped LB but the problem still remain.

Ferrix  suggest me to check the FUSE, i did not find it , Normally they are markedd with the F letter , can someone tell me where is located on LC motherboard that

FUSE or any other suggestion is appreciated 

Thanks a lot for your support!
Posted by: Macdrone on 2015-10-16 11:15:34
you sure its the port? have you tried other add devices? On recap did you clean the board from goo?
Posted by: uniserver on 2015-10-16 13:37:47
might have to remove Q3 and clean the pads... and clean the legs of Q3, solder back down,  as the cap goo spills all into it, 

look at the pads/ traces as well, do a continuity,  rot in this area causes this issue.

Screen Shot 2015-10-16 at 4.32.34 PM.png

if you get too frustrated and give up ... no fear... Ted Hodges in Denver has a stack of these that go from the floor to the ceiling and probably most still work.  He would probably send you a board for 15 bucks plus return shipping.  Shipping to you there is cheap! $13.10 large envelope.
Posted by: macalle69 on 2015-10-16 14:06:59
might have to remove Q3 and clean the pads... and clean the legs of Q3, solder back down,  as the cap goo spills all into it, 

look at the pads/ traces as well, do a continuity,  rot in this area causes this issue.

Screen Shot 2015-10-16 at 4.32.34 PM.png

if you get too frustrated and give up ... no fear... Ted Hodges in Denver has a stack of these that go from the floor to the ceiling and probably most still work.  He would probably send you a board for 15 bucks plus return shipping.  Shipping to you there is cheap! $13.10 large envelope.

Thank you Guys!

Thanks Uni!

i'm sure i'm not going to get frustrated with this Board ! I'll follow your suggestion!
1