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Author Topic: MDD 1.25 Uni, chime but no video output  (Read 34 times)

G4 MDD Steve

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  • Posts: 5
MDD 1.25 Uni, chime but no video output
« on: Yesterday at 11:58:21 AM »

Hello, I've just dug out of storage and attempting to resurrect a 2003 MDD 1.25 single processor G4.

I've bought new RAM (2x 512Mb), a new clock battery, reused an old 640Gb iMac HD with an adapter card. The monitor is connected with a DVI to DP cable. When I turn it on I hear the chime, which suggest the motherboard is OK, but the monitor does not detect an input signal, so I see nothing. I was expecting the flashing question mark for no OS present.

Is there a fault-finding sequence I could follow to narrow down the problem? I know the monitor is OK because I used it on my Raspberry Pi, which I just sold. So, to me, that suggests the video card or the cable, which is brand new. The card is the 64Mb version

Any help appreciated.
Steve
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blazer1878

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  • Posts: 24
Re: MDD 1.25 Uni, chime but no video output
« Reply #1 on: Today at 08:03:27 AM »

Some DVI-DP cables are one side only, i have cable that can only be used to connect dvi monitor to DP
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68K: PowerBook 165c
PPC: Powermac G4 400mhz Sawtooth, Powermac G4 MDD 1.25 Single 2002, iBook G3 2002, iBook G4 m2005, Powermac G5 2003 dual
Intel: iMac 20 l2006, Apple TV 2007, MacBook Pro m2007, MacBook 13 e2008, MacBook Pro 15 l2008 Unibody, MacBook Air 13 2014, MacBook Air 11 2010
Apple Silicon: MacBook Air M2
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