Dead TT (solved)

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emcclariion
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Dead TT (solved)

Postby emcclariion » Thu Mar 07, 2019 3:42 pm

Hi,

I have a issue, My TT was working like a dream and I wanted to change my Nova card to another with a different GAL, I managed to miss the VME guide and I think tapped the bottom of the VME riser...

After that, no boot Black screen, I have power to the mainboard as my power light comes on and my NETUSB lights come on, I have taken everything off, VME cables etc and still dead...

Looking at the field manuals the first thing to check is if we are getting clock, which I suspect I am not...but I cannot work out which pin I am checking on the CPU...think its Pin 6, but how does that relate to the CPU?

Also is there any UK based people who are willing to look at it, I have no issues paying for it to be repaired.

Thanks in advance
Last edited by emcclariion on Fri Mar 08, 2019 8:15 am, edited 1 time in total.
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paul92706
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Re: Dead TT

Postby paul92706 » Thu Mar 07, 2019 7:26 pm

What device did you use to check the clock? Also i am a owner of a TT also and let me tell you it is a wonderful machine but it is a headache, i think it could have been engineered better due to the socketed ICs. Those socketed Ics cause major problems as the machine ages. Try it pressing down firmly (not hard) on all ICs. To be better sure i would pull them out and clean the pins and sockets be very careful not to bend pins in socket or else they will not make contact with the IC when inserted, if you see any pins in socket bend inward i would use a small exacto knife and pull them out slowly. Good luck!
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emcclariion
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Re: Dead TT (solved)

Postby emcclariion » Fri Mar 08, 2019 8:35 am

Update, as when I had this issue all other threads did not solve the problem.

so....

after reading the field manual, there is only 3 things which would stop a boot into a white screen, Power, CPU bad, Clock bad or a Bus error

Power was good, so I was looking at the clock, and noticed 3 pins where bent next to it, it was W101 which is clock select and I had knocked the jumper off....all working now....ooops
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dhedberg
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Re: Dead TT (solved)

Postby dhedberg » Fri Mar 08, 2019 9:55 am

Great to hear! Messing up a TT is never fun!
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wongck
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Re: Dead TT (solved)

Postby wongck » Fri Mar 08, 2019 10:28 am

Glad the TT is working now !!
Messing up any Atari is never ever fun.
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