Thread
7600 strange issue
When I push the power button the mac startup, but not chime and black screen... turn off, turn on... work like a charm!
It is always like this, I have to turn on, off, and turn on again
Why?
It is always like this, I have to turn on, off, and turn on again
Why?
Try replacing the PRAM battery first
Pram is ok, 3,6v and not loose the clock. I suspect the problem is only with monitor attached at pci graphics, not with onboard video
Try the PCI graphics card in the slot closest to the CPU, and reset the PRAM/CUDA
Tried
First boot ok!
Turn off... Turn on, black screen
Turn off, turn on... Ok
Mistery... perhaps the problem is software powerdown?
First boot ok!
Turn off... Turn on, black screen
Turn off, turn on... Ok
Mistery... perhaps the problem is software powerdown?
Pull the CPU card and carefully clean the edge connector contacts. I've had good luck with glass foaming cleaner and a microfiber cloth. If you want to clean the socket as well fold some card stock, e. g. 3" X 5" card, soak the folded edge in alcohol and gently insert and remove from slot a few times.
While you have the CPU card out try powering up. I think you'll find it's just like the problem you're experiencing. The x500, x600 series will power up with no CPU or ROM, although it won't do anything afterwards. Power up is controlled from the CUDA chip.
While you have the CPU card out try powering up. I think you'll find it's just like the problem you're experiencing. The x500, x600 series will power up with no CPU or ROM, although it won't do anything afterwards. Power up is controlled from the CUDA chip.
Nothing... I cleaned all with dry contact cleaner! I going crazy!
-Reboot always ok
-After power off (with keyboard or power button) mac will not start.
-After power off, power on (mac not start), power off, power on... mac start without problems!
-When mac not start I ear the speaker try to reproduce a chime but stop at first second and I listen a "crank" from the speaker...
-I think is the caps but I have tried to power off, power on (not start), power off..... wait one hour.... mac power on ok! Another test is power off, power on (mac not start), power off... disconnect powercord, power on (caps discharge)... when I power on the mac start correctly! This is exclude the caps?
-Reboot always ok
-After power off (with keyboard or power button) mac will not start.
-After power off, power on (mac not start), power off, power on... mac start without problems!
-When mac not start I ear the speaker try to reproduce a chime but stop at first second and I listen a "crank" from the speaker...
-I think is the caps but I have tried to power off, power on (not start), power off..... wait one hour.... mac power on ok! Another test is power off, power on (mac not start), power off... disconnect powercord, power on (caps discharge)... when I power on the mac start correctly! This is exclude the caps?
I tried all ram configuration, with and without pci graphics, boot from cd... nothing
But there's something new! The problem (partially) not exist!!! I not listen the chime, the screen remain blank.... but if I wait 45 seconds the screen appear!!! And at 65 seconds start to load macos!
Is not normal.... true?
But there's something new! The problem (partially) not exist!!! I not listen the chime, the screen remain blank.... but if I wait 45 seconds the screen appear!!! And at 65 seconds start to load macos!
Is not normal.... true?
I had a maybe similar problem with 1 or 2 bad (but working) 128Mb memory dimm on a 9600 with PL G3/500:
cold boot : OK, computer never crashes
reboot : chime + black screen + nothing
upgrading CPU to 1Ghz PL G3 would definitly not work with these DIMM : same problem upon reboots + cold boot ok but computer crashed after some time.
marmotta said : " if I wait 45 seconds the screen appear "
This is normal to me, as it happens every time after a hardware configuration change (PCI slot or RAM). Could even be more than 1 minute depending on the 9600 config..
So I'd first try known working Dimms in the 7600.
+ Info : ONCE AGAIN the PowerMacs RUN FINE WITHOUT PRAM BATTERY. Without it, the only issue, ONLY after it has been unplugged from DC Power is, except a date/time loss, an NVRAM reset, which is not a problem as long as Mac runs OS 9 and has networking time. Not even a problem if you run OSX and the Mac never gets unplugged from power source.
cold boot : OK, computer never crashes
reboot : chime + black screen + nothing
upgrading CPU to 1Ghz PL G3 would definitly not work with these DIMM : same problem upon reboots + cold boot ok but computer crashed after some time.
marmotta said : " if I wait 45 seconds the screen appear "
This is normal to me, as it happens every time after a hardware configuration change (PCI slot or RAM). Could even be more than 1 minute depending on the 9600 config..
So I'd first try known working Dimms in the 7600.
+ Info : ONCE AGAIN the PowerMacs RUN FINE WITHOUT PRAM BATTERY. Without it, the only issue, ONLY after it has been unplugged from DC Power is, except a date/time loss, an NVRAM reset, which is not a problem as long as Mac runs OS 9 and has networking time. Not even a problem if you run OSX and the Mac never gets unplugged from power source.
Is normal wait one minute for system start load? Yes on changed config, but I wait one minute every time I powerup the mac...
I tested my dimm's with Apple diagnostic and appear to be ok. I have cleaned, moved, tried another dimm... Nothing change. Now I have 416mb with 8 dimm.
Remove the battery is possible solution? Why?
I tested my dimm's with Apple diagnostic and appear to be ok. I have cleaned, moved, tried another dimm... Nothing change. Now I have 416mb with 8 dimm.
Remove the battery is possible solution? Why?
Removing battery is not a solution here, i was answering some of this topic's previous posts. But you can safely remove it, and you should do so if it's too old (before it leaks).
If you currently don't simultaneously use 60ns and 70ns in your 7600, there's a chance that one DIMM is not so good, or interleaving is too strange..
You should start diagnostic with minimal RAM config..
I saw that once : there were both 60ns (gold connectors) and 70ns (silver connectors) DIMMs in a PowerMAC... maybe even that Interlaving was OK, I can't remember.
If you currently don't simultaneously use 60ns and 70ns in your 7600, there's a chance that one DIMM is not so good, or interleaving is too strange..
You should start diagnostic with minimal RAM config..
If is a ram problem, is a normal not listening a chime? I listen a chime only if I power down (during one minute wait) and power on (system start without delay)
yes it is
although it could be something else
please let us know your RAM config (interleaving & size & connector color for each module)
& once again
You should start diagnostic with minimal RAM config.
OS 9.1 will work with 1x 32mb module and no VM with extensions disabled
and no pci of course; you could even unplug any device such as zip or cd rom
and remove your pram battery as it's too old
although it could be something else
please let us know your RAM config (interleaving & size & connector color for each module)
& once again
You should start diagnostic with minimal RAM config.
OS 9.1 will work with 1x 32mb module and no VM with extensions disabled
and no pci of course; you could even unplug any device such as zip or cd rom
and remove your pram battery as it's too old
Actual config is:
Sonnet crescendo G3 400
GFX TwinTurbo128
Atto scsi uw with 73 gb hdd
Cd-Rom at scsi onboard
Ram: 6 modules 64mb 6ns gold, 2 modules 16mb gold. In pair... A1,B1 etc...
I already tried with different memory layout (128mb to up), without gfx, without cd-rom, with original cpu and without ATTO... with no difference. But when I have time I wanna retry
Sonnet crescendo G3 400
GFX TwinTurbo128
Atto scsi uw with 73 gb hdd
Cd-Rom at scsi onboard
Ram: 6 modules 64mb 6ns gold, 2 modules 16mb gold. In pair... A1,B1 etc...
I already tried with different memory layout (128mb to up), without gfx, without cd-rom, with original cpu and without ATTO... with no difference. But when I have time I wanna retry
well
nvram reset could be needed
remove power cord, remove pram battery, and try again in 24 hours with minimal config (minimum ram no pci) (stock cpu or g3)
just remember nvram has to be reset via cuda ( or removing battery powercord etc) each time you swap cpus
nvram reset could be needed
remove power cord, remove pram battery, and try again in 24 hours with minimal config (minimum ram no pci) (stock cpu or g3)
just remember nvram has to be reset via cuda ( or removing battery powercord etc) each time you swap cpus
PS
the AV card should be unplugged too for testing..
and use original hd & internal scsi please
the AV card should be unplugged too for testing..
and use original hd & internal scsi please
One question: my dimm of 64mb have some small chips, 16mb dimm have 8 big chips... perhaps 64mb is fpm and 16mb is edo???
big chips are older
no matter edo/fpm, both are compatible and work as fpm
just minimal-compact the config and 24 hour out of power your mac then startup
then if it doesn't work just go to a friend that has pci powermac and test your hardware
otherwise recap mother and daughter boards, as well as the psu
or get a mach5 9600
sincerly yours,
604ev
no matter edo/fpm, both are compatible and work as fpm
just minimal-compact the config and 24 hour out of power your mac then startup
then if it doesn't work just go to a friend that has pci powermac and test your hardware
otherwise recap mother and daughter boards, as well as the psu
or get a mach5 9600
sincerly yours,
604ev
I already have 9600 but not work... from the psu out 24v instead 12v from the small connector. I suspect did have damaged the logic board (i tried to send 12v instead 24v without success)
sorry marmotte,
please just minimal-compact the config and 24 hour out of power your mac then startup
please just minimal-compact the config and 24 hour out of power your mac then startup
Ok, some tests and some news!
Removed all ram, insert only 2 dimm's (64x2 A4/B4). No chime, but the screen appear very fast... 10/20 seconds, is clear the time of black screen is memory test, more memory, more black screen.
I removed all! Only 2 dimm's (16x2 A4/B4), removed all pci boards, restored 604 cpu. Boot from cd. Shutdown, boot.... chime ok!!!
Restored Sonnet G3... no chime! But boot very fast.
Restored 604, chime ok.......... Sonnet kill my chime!!!
Restored all my ram with cpu 604, chime ok, 45 seconds of black screen!
Sonnet G3 vs 604 = chime or not chime, no other difference
At this time i think 45 seconds of black screen at first boot is normal, is ram related... Mac run at first boot a full memory test, memory is so much and the time is long.
The conclusion is: I reinstall G3, not listen the first chime and I wait 45 seconds at first boot
at least I understand why 
Removed all ram, insert only 2 dimm's (64x2 A4/B4). No chime, but the screen appear very fast... 10/20 seconds, is clear the time of black screen is memory test, more memory, more black screen.
I removed all! Only 2 dimm's (16x2 A4/B4), removed all pci boards, restored 604 cpu. Boot from cd. Shutdown, boot.... chime ok!!!
Restored Sonnet G3... no chime! But boot very fast.
Restored 604, chime ok.......... Sonnet kill my chime!!!
Restored all my ram with cpu 604, chime ok, 45 seconds of black screen!
Sonnet G3 vs 604 = chime or not chime, no other difference
At this time i think 45 seconds of black screen at first boot is normal, is ram related... Mac run at first boot a full memory test, memory is so much and the time is long.
The conclusion is: I reinstall G3, not listen the first chime and I wait 45 seconds at first boot
at least I understand why
The startup delay is the memory test - it is normal - with more RAM it takes longer. Many G3 upgrades require faster RAM speeds (needing 60ns over 70ns).
i've seen some motherboards not working with G3s while others would do with the same components (i mean swaped ones). And these boards have been perfectly working for years with the original cpu.. they just wouldn't with a G3 card.
it's possible that yours is one of them.
You might try working with only the original CPU for some time, with full config, after full nvram reset, and then reswap cpu w/cuda reset to G3. Then you will know.
In any case you shouldn t use the 2x16Mb dimms that could be 70ns and are anyway useless if not too old and risky.
In fact 4x64Mb is enough and perfect for OS9 and thus you'll have 2 spare modules.
it's possible that yours is one of them.
You might try working with only the original CPU for some time, with full config, after full nvram reset, and then reswap cpu w/cuda reset to G3. Then you will know.
In any case you shouldn t use the 2x16Mb dimms that could be 70ns and are anyway useless if not too old and risky.
In fact 4x64Mb is enough and perfect for OS9 and thus you'll have 2 spare modules.
Last but not least:
is there an L2 dimm on the motherboard ?
is there an L2 dimm on the motherboard ?
Is true I not have good English
but G3 work great in my system, the only problem is I can not hear the chime at first startup... I suspect the G3 drain more power and psu cut the power at speaker amp.I have removed L2
The chime sound is stored in ROM. I expect the Sonnet board manipulates the boot process through its own ROM, perhaps bypassing part of the original system ROM in the process.