Until you do a thorough internal inspection, there is no telling what may have been knocked out of whack or broken.
I go hunting polar furs and the seal, leaping chasms with a pike-pointed staff, clinging to topples of brittle and blue.
Newer Sony monitors have this (don't know about TVs) - a most wonderful addition.The AC line input and degauss components are at the upper left, the smps chopper, its controller, and feedback opto-isolator are lower left/middle, and the secondaries - some with additional regulation components - occupy the entire right side of this diagram.If it's not an adjustment problem you probably have a bad part - somewhere.If the optimal setting is out of range of the focus pot, the problem is likely leakage in the focus divider in the flyback or one of the components on the CRT neck board.(Only what proves itself to every man and woman is so, Only what nobody denies.) A minute and a drop of me settle my brain, I believe the soggy clods shall become lovers and lamps, And a compend of compends is the meat.On monochrome monitors, the focus control, if any, may be located on the main board.I don't have Cable TV or anything special, just a simple antenna connected to the VCR to pick up the two local TV stations.First, if this were so, 75 Hz screen refresh would appear worse than 60 Hz, since it's farther removed from the line rate.The horizontal component of the earth's magnetic field affects this slightly.If the voltage is very low (less than 2 kV) and the pot has little effect: When measured right off of the source disconnected from the CRT neck board, then the problem is probably in the focus network in the flyback (or wherever it originates).So, before blaming the monitor, make sure your software settings (and monitor user controls) have been reset to their defaults.I bet your monitor is fine.The yoke position the beginning of infinity ebook angle adjustments are also done for the side and top-bottom skewing as well.Internal shorts in the focus/screen divider network, if present.Snaps, crackles, and other HV breakdown Various problems can result in occasional or sustained sparking or arcing sounds from inside the monitor.Stupidly w/o even turning it on, (big mistake) I begin to open the set.There is still something wrong.
Try its software setup adjustments as these may have been lost.
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