Amiga A1200T/040, is my Cv64/3D borked?

[wobbly]

 i havent fired up my miggy in ages - well years perhaps.
last time i fired it up all was fine.

just found all my cables again, fired it up and while the amiga itself and the drives all seem to operate, i get a black screen.

there seems to be a signal, as theres considerable 'plink'-ing when i disconnect the cable that connects the Cv64/3D output to the monitor.

now, the only other thing i can think to check my amiga is to somehow disable the cv64/3d retargetting when it boots.

anyone remember how - if possible - you can do that?



..or just take out my cv64 from the amiga?

thing is, with everything geared towards being on the retargeted screens, i dont know what will happen on the native screenmodes or if theyll get messed up by whatever codes and commands i had in my startup drawer or startup-file..

any ideas?
have cv64's gone belly up alot in the past?

i just looked in my old amiga mags - this thing cost me about 300 quid.. and the 040 was probably about 280 quid.. heh, i weep if i have to shell out that amount even these days..


==========================<>==========================
Commodore Amiga A1200 (Micronik Tower)
Blizzard 68040/fpu/40mhz - Micronik 6860 Busboard - 32+8mb FASTram
(scsi cd-rom, 4gb hard drives, Cybervision 64bit 3D 4mb graphics card, Macrosystem V-Lab...

[wobbly]

Update:

Remembered how to get to the early startup sequence.

So i definately know my amiga booted fine.

the cards are all reported as working.

drives all appear to be okay.

i selected 'boot with no startup-sequence' thinking that this would get me the standard amiga screen modes.

instead it went blank.

Tried other chipset modes, still comes out blank.

Aside from the early startup screen i cannot get anything else to show up on either the cv64 side or the amiga native side.

[doctorq]

"Boot with no startup-sequence" should definately give you a Shell output, but not on the graphics card. Try to hook the Amiga up to a tv, so you can see if anything happens on either screen.

If everything fails, strip down the system, and add one thing at a time.

[wobbly]

hmmmmm.. my ability to get the Early Startup Screen seems to be random, unless my old mouse is wonky..

Ah well, I've come to the conclusion, even with the Cv64 and other cards taken out, the Amiga is still not playing ball.

Its been hooked up to my multivitec, and my tv, and neither shows me getting beyond the few previous times I've successfully got the Early Startup Screen.

I guess its kaput..

 :-(
shame as i had a pretty decent spec..

[Argus]

Try re-seating the two rom chips.  If it's been sitting, the dip-style roms can get a bit dusty, corroded or even worked themselves upwards a bit while running all those years ago.  While you have the roms out, give the legs a good cleaning with some alcohol or pcb cleaner.

[Chain]

maybe it was a murder, if he has plug/unplug monitor while amiga was on ((

[wobbly]

?

i use a switcher box to switch between inputs to my monitor..

the unplugging of the cable was done only a coupl eof tmes, and the early startup screen had come after those times.
 i hadnt unplugged it in that way since.

i'll give Argus' suggestion a go in a bit.

[doctorq]

Well, the computer will not break because the monitor cable has been taken out and inserted again even with power on. I must have done this about 100 times or so at this point. It will only break if you try to connect it to a wrong port, but in general it is the best to have the computer switched off while attaching cables.

About the computer not booting. Amiga 1200 motherboards are easy to come around, and most of the times the go for cheap money.

[wobbly]

Yes, with the prices of Amiga's these days, its probably a better option to buy one than to get this repaired..

[doctorq]

I'm sure that the only thing that needs to get replaced is the motherboard, most likely the other parts are alright.

[wobbly]

Development!

Okay, i tried to see if the ROM's had misplaced, but i pressed on them anyway, took everything off my amiga so it was the basic mobo, and tried it again.

So my current situation is:

I can guarantee the Early Startup Screen and Floppy-Intro screen when: My System hard drive is not attached.


With System hard drive attached:
Early Startup Screen can sometimes come on [although I still dont know i this is dodgy hardware in my old Commodore Mouse] - But even when I get the Early Startup Screen and select Boot-with-no-Startup-sequence, the screen goes blank.

The drives seem to function normally, and it sounds like everything gets loaded from the hard drive as per normal.
I just cant see anything.

After about ten minutes of waiting my Cybergraphics intro graphic pops up but the Amiga seems to hang here, and no further progress happens.

So, I can now surmise that everything is present, correct and functioning, aside from:

Something to do with the hard drives...

Now, even if something like the startup-sequence was corrupted [but how can it be? its just a text file..]
 - it should surely go straight into the CLI screen?

Mine just goes blank.

So, despite it sounding like my drives are fine, and load everything as normal, is there something wrong with my hard drives?
or is it the ide cables?
or the ide adapter?

or software thats called upon in the startup sequence has failed..?
[But then that doesnt make sense when it fails with the Boot-without-startup-sequence function]

So i'm a bit stuck here..

[Chain]

u know, if u have another potentials on grounds of two electric machines, what will u get if its plugged in ON state? its a blink of eye and monitor/amiga is gone. i saw this, trust me.

[lorddef]

@Chain

{bleep}. It is a possibility, but the chances of this destorying his amiga are rediculously minute.