Dead Amiga 1200 rev 2B [REPAIR] 

Can't believe nobody's commented on the lovely bit of editing at 4:34 - OOOH, SUITS YOU SIR!!!!

Very nice - to this point I haven't heard about those USB Microscopes... Thank you for sharing this video, highly interesting to see that fractures under the scope and how it affects the miggy...

Great stuff! Subbed! Never seen that on an A1200 before, I wonder if it's related to stress of CF card slot regular use?

Devo dire che hai fatto un buon lavoro,praticamente col calore hai risanato le saldature del chip,sei in gamba

thank you sir. my a1200 is doing this exact thing. i will check out Alice... i replaced all caps and that did nothing..well lifted 2 pads, but did not break them..and still black..so Alice here i come..

Is it possible to send you A1200 motherboard for fixing? For a price of cource. My A1200 (1D4 escom) after 2 days powered on... is dead but the power light is green. No start up sign with the kickstart version.

I have a PAL Amiga 1200 I imported to the US. Right now I'm stuck using composite video output as I didn't get a monitor with it and RGB monitors/televisions are essentially nonexistent here. My question is, should I try a 23 pin to VGA converter (in hopes that one of my random VGA monitors is multi-scan) or save up for the Indivision AGA scandoubler?

Hi, great video! And probably not surprising I would need some help with my A1200. Some advice or some hint. The problem is as follows: I bought this A1200 sometime around the year 2002 AFAIR. In about 2005 I put it in an Infinitiv tower case. Unfortunately this A1200 has had always troubles to start up. Often it would take 6-7 times switching it on and off until it finally booted up. It often did simply nothing. No reaction whatsoever. But after switching it on and of, finally it booted up at some time. The configuration was and is: A1200 with Elbox Mediator 1200 LT4 busboard Blizzard 1260 Turbo car CD-ROM drive 1 GB, 2,5" HDD This was until about two weeks ago - when I decided to put it from the Infinitiv tower to a new "Elbox Black Box 1200" tower. But since then, the Amiga is almost(!) dead. I don't know what made the start up problems so much worse. The symptoms are as follows: 1. If you take the "naked" A1200 mainboard with no turbocard, no CD-ROM drive, but only disk drive and no hard disk - then it takes about 20 seconds to show the startup screen with the hand and disk 2. If you connect the CD-ROM drive additionaly to this, it boots to the "hand screen" instantly, with no delay whatsoever. 3. If you remove only the +12V cable from the CD-ROM drive, you are back to state 1. 4. If you connect the hard disk, the A1200 will not start up at all. No reaction. Nothing, besides an undefined black monitor signal. 5. If you connect the Blizzard 1260 card, you are also in state 4. No reaction 6. If you connect a Blizzard 1230 III card, which I also own, the Amiga started up a few times to the "hand screen" after 20 seconds. But after a few times failed to do so and then remained this way. Now the 1230 has the same effect as the 1260. 7. If you remove the disk drive, but connect the CD-ROM, then it boots to the hand screen after about 5 seconds. I think the pattern here is quite obvious. Disk drive and CD-ROM have their own voltage connections of +12V. Contrary to that the 2,5" HDD and the turbo cards have not, but get their power from the mainboard. The first two devices "help" to boot up, while the others make it impossible. There's some voltage issue behind this, I believe. Well...in my "despair" I tried to replace all electrolytic capacitors. I replaced most of them. A few weren't in stock by my local dealer and I should get them in a few days. But it helped nothing, so far. The Amiga still behaves exactly as before. There is one additional important thing, I should mention. This Amiga was definitely damaged before. I discovered that the ferrit bead, which is connected to Pin 23 of the video port is destroyed. Some previous owner bridged it with a fuse! It works, but seems a strange way to repair that. But this indicates that this mainboard was already damaged somehow, a long time ago. I suspect that these issues are somehow connected, but I don't know what part could have been damaged in addition to the ferrit bead, which could cause my problems. Yeah...that's it, so far. If you would have any hint, what to do or where to look, I would be very grateful. Sincerely, CommodoreFreak

hey bud, I have a problem with my 1200, rev 1B ... the red or orange colour is kinda drained. So dark red looks black, purple looks blue for instance. I've had it fully recapped, changed cables, psu, tv etc so it's definitely something inside. any ideas?

great job. nice to see it working. poor thing must have been abused.

Mine does nasty things with my disks. Probably U7 is dead, I will try to swap it with another one from a dead mobo.