Amiga 1200 does not work

[alphadec]

I have today recived a new amiga (A-1200) that I bought on ebay, but there is some issues with it so if anyone could help me tracking down the problems I would be very happy. Need to know how much it will cost me to have it repaired.

The problems with it is this.

- When I turn the power on it boots to amiga boot screen (there is no hard drive YET!). now it it takes 5-10 seconds and it will re-boot. And this keeps happening all the time.

- The mouse does not work

- the power or hard drive lights does not work.


These are the issues I have found sofar, so what can this be. ?

[paul1981]

Have you tried reseating the roms?

[alphadec]

Have you tried reseating the roms?

I have open the amiga but I could not see any problem.

What you mean "reseating". ?

switching them ?

[QuikSanz]

Also check the power supply output under load and see if it's falling down.

[QuikSanz]

Push lightly and evenly on the chip it may "click" indicating it's a bit loose.

[paul1981]

I have open the amiga but I could not see any problem.

What you mean "reseating". ?

switching them ?

It means to remove and then re-install... To 're-seat', which in affect will re-establish a good electrical connection of the rom chip pins in the rom socket.

[QuikSanz]

Be careful, you can bend a pin on removal.

[paul1981]

Just prise the roms out slightly with a chunky flat blade screwdriver and push down on them again firmly into the socket. Be very careful though. It is more likely to be failing caps though or power supply.

[alphadec]

Also check the power supply output under load and see if it's falling down.

The PSU I am using is the same as those cbm sold with A600/A1200 but I have a PSU that I used with my Amiga A500 I can try that and see if it workes better.

[alphadec]

Just prise the roms out slightly with a chunky flat blade screwdriver and push down on them again firmly into the socket. Be very careful though. It is more likely to be failing caps though or power supply.

I think I got a IC-Extractor I will use!!.
Is there any guide on how to install Kickstart on A1200. ?
that I can find online. ?

I did install kickstart 40.68 on my amiga500 but never had problems with that.

[alphadec]

Also check the power supply output under load and see if it's falling down.

how do I check the power current ?

[spirantho]

Probably the capacitors, I'm afraid. It should be looked at sooner rather than later as it's only likely to get worse! You'll need someone who's handy with an SMT rework station to change them all.
It may be something else, but on this sort of problem the capacitors are the first things I change.

[QuikSanz]

Check voltage behind the power socket while powering the machine. Low voltage = bad power.

[alphadec]

Probably the capacitors, I'm afraid. It should be looked at sooner rather than later as it's only likely to get worse! You'll need someone who's handy with an SMT rework station to change them all.
It may be something else, but on this sort of problem the capacitors are the first things I change.

How safe can we say it is "recap needed". ?

So where do i find someone who can do that. ?

[danbeaver]

To check the voltage you need a voltameter, but a multimeter will allow you to check the continuity of connections.

If you don't feel comfortable with all this, then perhaps you should send it to someone (like Amigakit) for repair.