A3000T Help!

[mechy]

Its pretty hard to get a good close up. Here's the best I could get. Note the washer and the green cable running under the ROM's. Looks like it may have been repaired before?

Also U103 is empty. I've read that some CPU cards need this populated to work properly but I've never had a chip in it and the CS MKII worked fine for just over a year until now.

Do I need to populate it to get the A3000t to boot?

Weed

that battery or another has definately leaked like kremlar said. you can go through with a multimeter and check for continuity on each trace.

do not put that style back,use a coin cell with diode as others have said.

[mechy]

I've had another good look at the board and its clearly been worked on previously. I removed the rom chip and the green line goes to one of the pins on the rom socket. Traces are also visibly shiny and the board appears to have been laquered.

I'll check for connectivity but where can I get hold of correct board schematics? Its a rev6.1 board?

Weed

You may not need a schematic(but you can download one), just use a multimeter set for continuity and check each trace from end to end to see if it has continuity- try and find vias or end points the traces lead to and check there. Its hard to get a good probe to register on vias since there is solder mask on them,but it can be done.
the typical repair you see there is common on the 3000t. most the time you clean and then tin the traces with solder to make sure they are intact,it may be a case that one of the repairs come loose or did not hold well.
i am guessing you will find the trace that has no continuity and repair it and hopefully you are back in business.

there is another thing that could of happened(lets hope not). acid inside the layers may have eaten something else.

i wish you luck on fixing it. a lot of persistence will pay off.

Mech

[mechy]

Thanks Mech,

I used to believe and use the green nicads and you helped me to switch over.

You are welcome.. the NIMH version of the barrel batteries leak just like the nicads also.. i tried them many years ago and one in the 3KT went fuzzy in under 5 years.Luckily no damage..
Avoid the Nicads and Nimh in my opinion.. If a coin cell cant be installed,leave the battery off. There are utilities to get the time from the internet if the 3kt is online.