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Damaged power cable?

Discussion board for Mackie's d8b Digital Console users.

Re: Damaged power cable?

Postby Muzicpro » Thu Jan 17, 2019 10:31 pm

OK, I think I'm almost there! I installed the firmware hack of 5.1 via the link and now am back up and running! I checked the continuity of my db25 cable and it seems fine but I still don't have a read out on the long screen on the upper right hand corner of the board. I'm not sure a new db25 cable is worth a shot or if that readout is related to the big power cable? At any rate, assuming the board passes audio (which I have yet to test as I bypassed it last week) then I guess I should be happy. This way, assuming I sell it I know it (mostly) works;-)
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Re: Damaged power cable?

Postby Y-my-R » Thu Jan 17, 2019 11:20 pm

Good to hear that the hack worked, and the board is generally running again!

If the delete key works after booting up, then it's probably just a timing issue when you hit it after turning the power on.
Don't hold it as you power on. There's usually an on-screen display that says something like "hit DEL for CMOS". Once you see that, be quick and repeatedly hit the DEL key (also try F8 or F1 if that doesn't work, but it SHOULD be delete). Don't keep it held down, that doesn't usually work.

As for the display in the upper right (that one's green, usually... the SMPTE is red... that's why I thought you meant that one), did that stop working at the same time as when these other problems with the desk started? (asking for license, etc.)

I'd suspect a bad connection inside the desk itself, but I didn't have that particular problem before, so I'm not sure. It 'could' be the big cable that connects the CPU to the desk, but again... not sure, and my first guess would still be a connection issue inside the desk.
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Re: Damaged power cable?

Postby Muzicpro » Fri Jan 18, 2019 6:42 pm

Thanks for all the support everyone! I’d still like to solve these 2 issues if possible but, the board seems to be running so maybe it’s moot.
1) get the fouro display to turn on again
2) get into the bios, right now it goes right into the 5.1 splash screen and holding delete or f1 does nothing.

Would a reinstall of 5.1 be worth a shot? I tested my db25 cable for continuity and it seemed fine but that’s something I can buy at Frys and try out.
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Re: Damaged power cable?

Postby arjepsen » Sun Jan 20, 2019 3:36 am

if I understand you correctly, you have a working desk in "demo" mode?
Meaning you've installed 5.1, and it lets you work for some minutes as a demo?
That would mean it's working - just need to do that hack that munkustrap made.
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Re: Damaged power cable?

Postby Muzicpro » Sun Jan 20, 2019 5:13 am

arjepsen wrote:if I understand you correctly, you have a working desk in "demo" mode?
Meaning you've installed 5.1, and it lets you work for some minutes as a demo?
That would mean it's working - just need to do that hack that munkustrap made.

No, I did do the hack and it’s running. I can’t get into the bios as hitting delete or f1 does nothing. When it boots I never see the screen that used to come on before the 5.1 graphic. It goes from off to a short amount of black right to the graphic. On top of the I have zero florous screen, it’s dead.
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Re: Damaged power cable?

Postby arjepsen » Sun Jan 20, 2019 4:54 pm

ok - so do you get the gui up and running? Can you use the keyboard and mouse after it has fully booted?

It's not uncommon that the monitor responds a bit slow. When I want to get into the bios, I turn the machine on, and then imediately start tapping the delete button, until I get to the bios screen. Start spamming that button, the second you start the machine - don't wait for graphics.
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Re: Damaged power cable?

Postby Muzicpro » Sun Jan 20, 2019 5:30 pm

arjepsen wrote:ok - so do you get the gui up and running? Can you use the keyboard and mouse after it has fully booted?

It's not uncommon that the monitor responds a bit slow. When I want to get into the bios, I turn the machine on, and then imediately start tapping the delete button, until I get to the bios screen. Start spamming that button, the second you start the machine - don't wait for graphics.

Yes, the board boots up and “works” (minus the led screen). I’ll keep trying to get into the bios. I’ve tried holding the delete key (just makes it not boot at all) and taping it but I’ll try again. I thought maybe checking out the bios would give me a clue why the led isn’t working. The led did work during the time I’ve been trouble shooting but at some point just “quit”. I think it happened at one point when I unplugged and plugged back in the big power cable back into the back of the board. Maybe I shorted something and blew it up? Who knows.
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Re: Damaged power cable?

Postby arjepsen » Sun Jan 20, 2019 9:29 pm

If it boots up to a working gui, then I don't think you need to get into the bios.
The main important settings in the bios (from what I understand) are the settings concerning the irq and com ports.
Irq 10 needs to be reserved for the midi card, since it's running on the ISA bus.
The com ports are also important, because they are how the cpu unit communicates with the desk (through the serial cable).

Sometimes my led display doesnt show anything imediately, but it always turns on when the cpu unit starts sending the firmware to the desk.
However, if you're desk is all up and running, just minus the led display, then something is more likely wrong inside the desk.
You could try reseating the various cables, to see if that would help.
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Re: Damaged power cable?

Postby scottosterloh » Mon Mar 25, 2019 4:06 am

I have the same issue "no display" did you try reseating cable in the D8B? If so did it work?
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Re: Damaged power cable?

Postby arjepsen » Mon Mar 25, 2019 12:28 pm

No, as mentioned, my lcd always comes to life when the firmware gets uploaded to the desk.
Apart from the lcd display, does everything else work correctly?
If your lcd on the console doesn't come to life at all, but everything else works normally, it could indicate that your lcd display is dead.
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