Re: Genesis Logic board and Power Supply

[James Rice]

Kyle Koerner wrote:

Hi All,
In my continuing efforts to fix my Daystar Genesis 528 MP, I have a 
few more questions and things I would like to try.  First, does anyone 
have the voltage readings for the power supply, so I could test it to 
make sure it is functional?  What would I test, and what should I be 
looking for?

Second, is there any way to test the logic board to determine if it is 
functioning or not?  The problem is a chime but no video.  I have 
reset CUDA and replaced battery, which reads 3.7 volts, so I know it 
is good.  This behavior is the same with both video cards (iX Micro 
and flashed [not by me] 3Dfx).

I've tried disconnecting everything - hard drive, CD drives, and 
floppy.  Tried without keyboard too.  Here's the thing that has me 
stumped: I cannot reset the PRAM.  I have tried and tried and tried, 
but it just ignores the command.

Open to any and all suggestions.

Kyle-


Down load the service manual:

http://daystartechnology.com/Daystar_Technology_Mac_Support/Daystar_Technology_Mac_Downloads/Daystar_Digital_Mac_Downloads/Mac_Support_Documents/manuals/Man_GnsMP_Service.pdf

The power supply voltages are listed in Appendix "C".  There are also 
trouble shooting charts and procedures in the book.  The power supply 
voltages have to be measured under load as a switching supply won't 
start without a load attached.

I had a similar problem with one of my Daystars (I have three Genesis 
MP's and one Millennium).  I finally traced it to a bad motherboard and 
everything was cool after that.

James

--
www.blackcube.org  The Texas State Home for Wayward and Orphaned Computers



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