Crazy over heating cables. [Fixed...]

[iamaboringperson]

I find that my A4000T keeps restarting.

And the power (P8 & P9) cables get very hot, the red wires especialy are getting hot, and on the connector the plastic arount the pins that are connected to the red wires is melting and burning and turning black/brown. It's really not a pretty sight.
I'm wondering if you could tell me where the problem is.

I will be replacing the PSU + wires. But That might only be a short term solution.
The problem only seems to be at the connector end. Could it just be cruddy connectors?

[iamaboringperson]

It's just commodores ####ty old A3640 :-(

[iamaboringperson]

CPPC is JUNK! A3640 mil spec is the best accelerator for your Amiga 2000HD Professional!

:lol:

Good to hear you're replacing the PS but be careful, and in the meantime, keep a fire extinguisher nearby!

Don't worry, I've had plenty of experience with AT PSU's ;-) (And no, I wont be opening it :-/ )

[iamaboringperson]

hmm, Thanks for the link Oldsmobile_Mike.

I think I will replace my PSU now. :-)

[iamaboringperson]

loading this up with power sucking cards like 040's or (in my case) my PPC card and other various zorro cards, (see signiture below) would cause the plug to heat up due to the amount of current required by the mainboard to support all these devices running through a very small contact area.

That shouldn't be.

It's the standard PSU in the A4000T, my 'accelerator' card is the old Commodore one that comes as standard, and I only currently have one zorro card, one hdd, and no cd drive etc...

My x86 machine has the same wattage PSU, however it has a faster and less efficient cpu, usually has 2 cards, and a whole bunch of other stuff.

If a 250W PSU is enough for your average Pentium machine, I'm quite certain it's good enough for my amiga.

[iamaboringperson]

sir_inferno wrote:
REGARDLESS...i'd suggest you get a GFCI and a CO2 fireextinguisher to put near the comp..

I might even take your advice ;-)

I've recieved another PSU, and I assumed it would come with a switch! No swich, my A4000T PSU's switch is soldered onto the leads, so I could desoler those and then just plug these other wires on. Or I'll just buy another switch.

The scary part for me is working with high voltages, even though I know all I have to do is match up the colors to the correct pins, the fact that it's high voltage scares the #### out of me(been electricuted before), however I suppose the worst I can do is 'hot wire' the thing ;-)

[iamaboringperson]

Oh. I forgot to mention, that I took pictures of the burnt connectors, and I might upload them soon, so that we may discuss what went on even further.

[iamaboringperson]

Man you have been electricuted and are still posting here. Now that is a shock!

heh
That's not by mains voltages though. It still is an unpleasant feeling :-(

The low voltages out of a ps will not hurt you. The higher voltages going in (lin in) and found inside the ps will. Just don't open the ps case and you will be ok.

I'm not worried by the 5/12 volt ones, it's the wires to the switch that worry me!

[iamaboringperson]

DoomMaster wrote:
To iamaboringperson:

I find that my A4000T keeps restarting.

Now do you see why I have 3 Amiga 2000 Series computers and not a 3000 or 4000 model?  The Amiga 4000 is not built as good as an Amiga 2000 Series computer.  Commodore had lowered the quality on all of the Amiga models AFTER the Amiga 2000 Series, but they refused to lower the quality on their Flagship computer.     :-P

Who asked you, "DoomMaster"?

[iamaboringperson]

Done it! :-D

I've replaced the PSU, connected the cables, and I have even replaced(and connected) the switch! :-)))

I was scared as hell doing this, and I switched it on with some anxiety, however I'm glad it's done now.

I've had the thing going for several minutes, and all looks well! :-D


--Edit: I might upload some pics of the connectors soon

[iamaboringperson]

To illistrate:



Note that it's only the +5V lines... very strange