I thought about adding a cap, but I'm not sure how to properly calculate the required capacitance value :-\
Caution: Non registered users only see threads and messages in the currently selected language, which is determined by their browser. Please create an account and log in to see all content by default. This is a limitation of the forum software.
Also users that are not logged in can not create new threads. This is a, unfortunately needed, counter measure against spam. Please create an account and log in to start new threads.
Don't Panic. Please wash hands.
The firmware update helped me, but I also chose to retrofit a low-profile 40mm fan to keep things cooler
Thanks, will try that today!
Finally got my Indy mk3 yesterday, installed it but...after a while I started getting "analog noise" on the HDMI output - looks like random color waves. At first a few glitchy lines, then the upper half of the screen, then an entire display was all noisy. Turned out it's related to Lisa getting hot - as soon as I start blowing at it or waving a piece of paper at it - analog noise goes away. I suspect it's either the thermal expansion issue, that causes the bad contact between the Indivision and Lisa, or maybe Lisa itself doesn't like heat that much, I'm not sure. Seeing that the Indy doesn't have any mount holes, attaching a fan might prove difficult :-\ Has anyone been having similar problems?
By the way, is the IDE boosting a hardware-only feature, or will there be a possibility to upgrade an existing ACA1233n?
seems like it's Alice issue after all. When I tried to run tests again, I suddenly started getting gurus when inserting a PCMCIA card, and now it doesn't even boot - no video signal with onboard CPU, black screen when the ACA1233n is inserted.
I do have a couple, will see how the test goes with those
AmigaTestKit still shows memory errors in random locations, though, despite everything else looking fine, that troubles me :-\
I fixed it. It turned out that I missed a solder bridge on address line 4 on one of the DRAM chips, now everything works a treat, including the ACA1233n that I got just yesterday, woohoo! So yeah, the reflow fixed the original problem, wherever it was, I just accidentally put a solder bridge between A4 and ground, found it while doing a continuity test of chip ram lanes.
Well, after reflowing the chips, I'm getting the green screen. I guess I'd start with replacing the chip ram, and then Alice, if it doesn't help.
thanks, I will try that
Sad news - recapping did not help But now I know, that the problem appears when the Amiga has been working for some time and heated up. The longer it's up - the worse. Starts from random software errors, then at some point begins cyclically rebooting after GURUs (random errors like 8000 0004, 8000 000C). And garbage in the early startup screen. Should I replace Chip RAM, maybe?
some screen pics:
Have you checked that all the chips, if socketed, are all firmly in place? Have you tried SysInfo to look at the system? Perhaps you have a flaky custom chip....the accelerator won't help video output...
All custom chips on the A1200 are soldered. No, haven't tried SysInfo yet, as I didn't have any options of transferring files to Amiga from PC at the time. Now I do, but have to wait for the caps..
Will do, as soon as I receive new caps and install them
This may be somewhat off-topic, but I figured I'd ask anyway.
I have an Amiga 1200 by Escom (from Amiga Magic German bundle, board revision 1D).
I have this disturbing hardware problem with the Amiga randomly GURUing and sometimes rebooting. This happens with no additional hardware installed, just the HDD.
Tried a couple different PSUs to no avail.
The problem can be almost certainly reproduced by soft-resetting the Amiga and getting to the configuration screen (with boot order and stuff) - and in the menus there, instead of names of boot devices - garbage appears, as if there's some memory corruption happening.
I know, that sounds very much like bad capacitors, but when I've de-soldered all the electrolytic ones, their capacitance measures within the margin of error from their stated value. Could they have still gone bad? I've already ordered a replacement kit, will see if it solves it.
What could be other causes for that? Bad RAM(is there a reliable way to test chip ram?), CPU cache, custom chips? Will my newly-ordered ACA1233n help me with that somehow?