A4000 boot failure

[Kin-Hell]

Ground yourself to a Good Earth.
Strip the Amiga so all you can see is the mobo on the Chassis. Check the tops off all the Capacitors for ruptures. They will be domed if they are blown.
Also check for Capcitor leakage. This looks like it's sweaty & has a wet syrup like feel to it. Not always easy to spot.
If nothing shows abnormal here, keep earthed & Gently push down on all the Custom Chips which are socketed. I prefer doing this out of the chassis on an Antistatic mat tbh. You might "over-push" whilst on the Chassis stand-offs & break something!
Make sure all the Ram is contacting good & rebuild with Just Floppys. Make sure the PSU is healthy. Make sure the Molex Connectors are secure & Connecting good. If for putting the hard drive back on, you still get a Grey Screen, I'd say you're CIA Chips are Shot! These are surface mounted so you will need to have good soldering skills (Proffesional) or send it to JJB at Amiga France.
To avoid knackering the CIA's NEVER plug or un-plug ANY device into your Miggy when shes Powered Up.

Good luck however it turnns out for you. :-)

*Edit - Shades of grey are huge & different monitors can display different shades of Grey!

Dead Machine


Amiga Hints

[Kin-Hell]

Shamus_ wrote:
An hour and a bit later......


I tried 3 different motherboards, 2 different '040 cards and an '030 card and tried 3 different sets of both fast and  chip RAM. All 3 m/boards exibit the same strange behaviour, that being if I remove the chip RAM, only about half the time do I get a green screen. Possibly a PSU problem? What do you guys think?  

Sounds very possible. Only a swap out will conclude!

Be real sure that processor card is well seated. They can appear "in", but arnt "in" sometimes. Do a visual with the CPU cards edge connector in relation to the Mobos Connector edge. Be sure they are paralell & fully mated. Thats MAXIMUM insertion...if you'll pardon the expression!

I have an ATX to Amiga A4KD Convertor here if you cant find another PSU. I'd like £12 for it + P&P. Excuse the "Sales Pitch" Admin, just trying to help! ;-)

Good luck!  :-)  

[Kin-Hell]

You are lucky to have lots of hardware to swap around. Just dropped you a PM & btw, RE Blonde moments, have a look at this:

Microsoft Word for Blondes

LOL, Speak to ya l8r.  :-D

*edit* Did you look at the screen colour codes on the earlier links. You may be suffering a combination of things/problems. Board sag under the IDE connector can be a total sod, If the IDE header isn't making full 40 pin contact, it can do wierd things! :-o

[Kin-Hell]

Shamus...check your PM's mate!  :-)