Unreadable, jagged screen with my Mac mini G4.

Hello all!
I have a Mac Mini 1.25G4/512MB/40GB/Combo that refuses to boot correctly and I'm starting to think that the GPU is somehow damaged. I've tried everything to fix it without success..
When I boot the computer it get the question mark/finder blinking icon. So I tried to use my 10.3.7 retail disc to reinstall from scratch but everything on screen looks jagged and unreadable, see the thumbnails below.
And the installer won't let me go to the next step either.
Ok, so I have gone through these steps (fsck/PRAM/NVRAM/PMU):
http://support.apple.com/kb/TS1417
http://support.apple.com/kb/HT1379?viewlocale=en_US
http://support.apple.com/kb/HT2183?viewlocale=en_US
I've confirmed that the hdd is functional and tried different RAM's. Does anyone recognize this issue and what should my next step be?
I'm grateful for any help I can get. Thank you.

Thank you
I have tried with other displays, but of the same model. I use an Eizo CG210 with a DVI connection. I have another Mac mini of the same model hooked to one of those screens, and it doesn't have any display issues.

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"No signal" on screen with new mac mini

Hi
I have just bought my first Mac Computer. When everything ist properly connected and I start the Mini, the monitor shows "no signal". The Mini ist switsched on and starts (light goes on). The Monitor is a 4 year old TFT with Analog port (white adapter neccesary to connect it to the MAc Mini). I tryed with another Monitor (6-year old Phillips) and the Screen still stays black.
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The fact you are getting the same symptoms with two displays suggests the mini or the DVI/VGA adaptor may be at fault.
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Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
While you're at it, resetting the PRAM won't hurt anything and 'might' help is SMC reset didn't work (PRAM does some port control):
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
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Something else you might try .... you don't say how you're updating to 10.6.8, however, if you're using Software Update, you might try downloading the 10.6.8 combo update, which contains all updates to 10.6. Sometimes, Software Update doesn't work quite right, and installing the combo update fixes that. Download the update from Apple's download site at http://support.apple.com/downloads/ , using Disk Utility repair permissions, apply the combo update, then repair permissions again.

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Unfortunately, the new Firmware version (908x) does not work with the model "68UNHUB-B7U" you have. The hub bellow has much less complaints about Mac issue. We suggest that you order this one.
http://www.amazon.com/gp/product/B009Z9M3DY
AnkerDirect Customer Support
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http://www.apple.com/feedback/
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I there, my question is quite simple, I would like to know if the "apple remote control" can be used with a mac mini and , if so, it can be used to control also the "logic pro" functions (e.g. record, start, stop etc). Thks a lot, Danilo

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Unreadable, jagged screen with my Mac mini G4.

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