Arcadenut
Well-known member
Was the package insured for the value of the chassis?
In my experience, Insurance is only good if you can prove it was damaged in shipping. Unless the box is badly damaged, you'll have a hard time collecting.
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Was the package insured for the value of the chassis?
Where is your -V sync? You either need to run -H and -V to the right pins, or if you're doing composite sync, you need to tie -H and -V together.
In my experience, Insurance is only good if you can prove it was damaged in shipping. Unless the box is badly damaged, you'll have a hard time collecting.
Update:
1) Someone pointed out to me that you can't measure any possible voltage coming into the monitor frame by clipping on to it and the switching PS ground, so that 109v ac I was getting was incorrect.
if by applying earth ground to the frame of the monitor blows the fuse then you dont have a properly installed isolation transformer in front of the monitors AC supply.
An un isolated monitor will blow open the video ground trace on a logic board in a heartbeat. Some boards seem to be able to deal with it (probably an isolated GND on the board) and some not (that arcadeSD for instance).
You need to correct that before you move on.
Once you correct that check the boards that wont SYNC, you will probably find that their video GND traces are blown open.
FWIW, you can attach earth GND to logic GND. In many cases doing so actually gets rid of noise on teh screen that some switching power supplies create.
If I'm reading this right you measured 109VAC between the frame of the monitor and the GND on the power supply???
That should be WAY closer to zero. Like less than 10 volts AC probably.
Fix that ISO!
That reading came from connecting multimeter to monitor frame and PS logic ground, which I was subsequently told is an incorrect way to read voltage coming off monitor frame. I'm unsure how to measure this.
While it may in fact be incorrect it is a way to see if your monitor is properly isolated or not. When it is that same procedure will net you a low voltage measurement. If its high (like what you ended up with) then there is probably something wrong (as in ISO is not in circuit).