I finally fixed my Polo 25" with your help!

[Yanitzch]

Hi,

Thanks for your help!

The monitor was working, but the image was squished down on the bottom of the screen.  I search for advices on many places, but I quickly found help here on Arcadecontrols. 

Special thanks to Ken Layton who conviced me to go for a cap kit and telling me where to get it cheap (from Zanen Elect.).

I contact Zanen and they send me a complete cap kit and a vertical deflection chip (a small 21$, shipping incl. to Canada).  They advice me to try the caps first and then change the vertical IC if it did not work.  But since I had the chassis removed, I decided to do everything in one step.  The bad side, I can't know what was the real trouble.  The good side, it's now working better than ever!

Thanks again,
Yanick

[modessitt]

You should keep your old chip.  The reason they told you to try it with just the caps is because if it worked, then you'd know you had a good chip to save for a future problem.  Now you have a maybe chip that might or might not work.

Don't know how everyone else feels about this, but whenever I change a chip, I like to put in a chip socket so I can swap chips quickly.  Helps when I'm trying to diagnose a chassis (or board) and know I can pull a working one from another chassis to see if that's the problem.  I try to use high-quality sockets to ensure good connectivity.

[Yanitzch]

If the chip was very expensive or difficult to find, I would have tried just the cap kit first.  But at 8$, well, I think the time I would have lost reputting everything together in my cabinet worth more than that.  And dischargind my monitor with the screwdriver and my rubber gloves... humf the less is the best

I taught of putting a socket, but since the heatsink is fixed on the chassis, I was worried about the alignment of the chip.  Anyway, what are the odds I will ever have to change the chip again?  My cab is on less than 15 hours/week.

Take care,
Yanick