Re: IIgs --- no composite video; RGB is okay

[acrout@vcn.bc.ca (Al Crout)]

stephen e buggie (buggie@ben15.unm.edu) wrote:
:    IIGS CPU:  COMPOSITE VIDEO IS OUT, YET RGB VIDEO IS PERFECT
:    ===========================================================
: 
: I got yet another IIgs CPU, which passes the self-test.  But the RCA-jack
: for composite video output does not work.   The standard db-15 RGB video
: output works perfectly.
: 
: I removed and inspected the motherboard, but there is no looseness or
: physical damage around the RCA composite video output jack.   Physically,
: there is no apparent damage elsewhere on the IIgs motherboard.
: 
: Any advice on troubleshooting?  I realize that its much better to have RGB
: capability than just composite video, but I'd like to repair this fault.
: I have several blown IIgs motherboards in the shop from which I could
: salvage components ---- I can desolder them okay.
: 
: Steve Buggie
: 
: 
: 
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:  ** Stephen Buggie,  Psychology,   Univ. of New Mexico, Gallup NM 87301 **
:  ** buggie@unm.edu                  voice: (505) 863-7504  or  863-2390 **
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: .
: 
Steve, with my limited experience regarding Apple II composite video, the
problem of no video is often solved by replacing the cable connecting the
computer and monitor. 

-- al