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Hi Guys
I got another PSU today from ebay for my A500. It is one of the really heavy one's which out puts at 5V 4.3A. When I tried it. It did the same thing as the last I bought. The amiga come's on the power light and caps lock are red but the kick start does not appear. I took the psu apart and it had a large crack in the circuit board. :thumbsdown2:I take it that the psu is at fault again?
Thanks
slicer1000
Maybe, although as some power is reaching the Amiga it could be something else.
What happens on screen when you turn the system on? The different full coloured screens mean different things.
There are many but here are the main ones:
If there is something wrong with your system you may see the following colours.
- Dark Grey: The hardware test has been completed OK, and the registers are readable.
- Light Grey: The software side has passed.
- White: The initialisation is correct and the system is ready to boot.
- Red: An error was found in the ROM.
- Green: An error was found in Chip ram.
- Blue: An error was found in the custom chips.
- Yellow: The CPU has found an error before the error trapping software (Guru) has been activated.
Hi Harrison
The screen is white as if the kickstart is about to appear. It just never does.
The only thing my A500 had was a flashing caps lock but this never effect the machine in the past. It would just disable the keyboard.
http://www.geocities.com/shining3master/circut2.jpg
the gold line shows the crack in the psu
thanks
slicer1000
Have you tried the PSUs with another A500?
On the subject of A500 PSUs, mine doesn't power the Amiga at all :(
No the only other amiga I have is a A1200. The First PSU I got I did test on my a500 and another in the shop I got it from it did the same on both.
The light's came on but no kickstart appeared. The thing is part of the circuit board has been pushed forward making a very nasty crack in it.
I have had my fair share of evil bay today. I got a Flashback off it as well disk's 1&2 are corrupt! and I also got indiana jones and the fate of atlantis disk 3 & 10 have read/write error's to say I am not in a good mood is a understatement.
Do any amiga product's sold on ebay work or are they all just junk?????
It is quite easy to restore corrupt game disks. Get hold of the ADF files for the games, and you can easily write them back over the corrupt disks to get the disks back. As you have an A1200 that will be quite an easy process. If you want full details on what you need, and where to find the game ADFs send me a PM.
Regarding the PSUs, have you tried them with the A1200, and if the A1200 PSU works have you tried that with the A500? They do work with each other. In fact, the A500 PSU is much more powerful than the A1200 one so many people use them with an A1200 when they expand them with HDs and accelerator cards.
Hi
Flashback has hard track error's on the disks so they are messed up and the disk doctor may fix indiana jones. I got round that fault any way.
As most of the adf's you can download are from pirate copy's they do not always work with the offical release as some change's where made to the game code. team 17 games are a prime example the pirate versions all had extra disk's to get past the protection on the offical disks
As I said in the last topic my A1200 has a A600 power supply something you said was a very bad idea to use on my A500. If I try the A500 psu on my A1200 can it cause any damage to it? As it has a very nasty crack on the circuit board and it goes across one of the gold connector's on the circuit board. The last thing I want to do is damage my A1200.
I don't think it would damage the A1200. But to be safe it might be better if you can get hold of a multimeter and measure the output coming from the PSU.
I think it would be best if I just return it to the seller. After all there should be no crack's in the power board.
True.
You could however try the A600 PSU from your A1200 with the A500. It won't do any harm being less powerful and will power an unexpanded A500 fine.
Where's the best place to start looking for faults in an A500 PSU that doesn't work at all? I have checked the cable connections and the fuses and they are all OK.
If you have a multimeter test the connection at the end you plug into the Amiga with the PSU plugged into the wall and switched on.
Next open it up and carefully look at the capacitors for signs of leakage. This can look like yellow or brown gunk around the bottom of the capacitor or coming out through the top where the X shape is. Another sign of dead capacitors is if the top of them is budging up, they should be completely flat. If any of them show these signs then the PSU is dead.
If those all look OK then see if you can smell any electrical burning smells inside the PSU. Is so then one of the capacitors or other parts has burnt out and it is dead. Failing that it could be a dry solder joint and this would require you to completely disassemble the PSU and carefully examine all of the joints and resolder any you think are suspect or cracked.
Hi
My a500 had a 512k upgrade making it one meg. will that be ok with my a600 psu I do not want to damage a working psu.
dry solder joint are quite hard to fix as that was the reason my first saturn packed up.
Yes, the A600 PSU will be fine with your A500. It won't break the PSU if it can't deliver enough power, the Amiga just won't work properly. But for a standard A500 with a 512K trapdoor expansion the A600 PSU should be OK.
Thanks
Harrison I tried the A600 it came on and powered up. It did the same thing as before them I put my hand on the keyboard and bingo up came the kick start.
So I tried a number of the games I had bought the other week which did not work on the A1200 and they all worked fine :D
I also tested the GVP A500-HD8+ hard drive I had bought and it works fine installed indiana jones on it and it run's faster and there is no disk swaping.
The only thing my A500 has is a fault with one of the 00 chip's as the capslock flashes and none of the keyboard will work. If I hold down keys on the board it will start to work again.
Also does work bench 1.3 have a show all command like 3.0 as once I install flashback on the HD you cannot see the folder in widows. you need to use cli commands to view it.
Is there any way I can fix this error more permently?
Thanks
slicer1000
The most common keyboard faults are due to the Amiga's two CIA chips on the motherboard. You could try swapping these two chips over and see if the keyboard then works correctly. If so one of the chips is damaged and you will need to get hold of some new ones.