16 May
2008
16 May
'08
6 p.m.
On Friday 16 May 2008 15:31, Tony Duell wrote:
Well, if the Hsync pulses are indential whether the display is stable or
not, then the Hsync generation circuitry is not the prolem. And if the
monitor is not locking to them, the fault is either the monitor or the
PSU, presumably.
Without any indication of amplitude or repetition rate it's hard to say
whether they're good Hsync pulses or not. The image of that Vsync pulse sure
looks a little odd to me...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
That's why I'd start by looking at the
horizotnal sync pulses
when you have the lines and when you have a good display
(even if the machine has crashed). If they're the same
timing, then the fault is monotor (or PSU?) releated. If not,
then the video timing circuitry is palying up _or being
mis-configured by software_
H-sync pulses (and the vsync, for what it's worth) are identical when the
machine is crashed or running. However, I don't understand why that would
put the fault in the monitor? And it still doesn't explain the digital
artifacts...