I'm having a problem getting a k4600 to sync V or H @ 15KHz. I'm using windows xp sp 3 with Soft-15KHz and can get a picture at, say, 320x240 but it will not hold sync. It constantly rolls both H and V slow enough to clearly see the image. While doing this, the left and right edges are warped. The odd thing is if I send it the signal intended for my LCD (1366x768) it syncs to THAT ("straight" edges and everything). Of course, when it does this little trick, it displays in 3 bands across the monitor. It DOES sync at the higher frequency, though. The same behavior is displayed using an ATI HD4650 and the onboard Intel 945 graphics.
I have replaced all electrolytic caps, R360, TR201, TR202, TR203, TR210, and TR308 per Fromm's flowchart, but I've gotten nowhere.
Anyone have any suggestions?? Thanks.
Oops! I should probably add some more info. Input path is straight from VGA to P317 input board pins 1-5. I have verified I have Vsync attached to pin 4 and Hsync to pin 5.