Well, I would pulll the cover and take a look. It's not unheard-of for the internal prests to be labelled. If not, see if there are any identifyable ICs. The vertical defleciton circuit i na lot of European monitors is based roudn the TDA1170 IC, for example. Gettign the data sheets on the ICs should give you an example circuit which is likely to be close to what's in the monitor. If you find, for exampe, that the verticla timebase involves a resisotr from pin A to pin B and a capacitor from pin B to ground, try to find those components on the boartd. If the resistor turns otu to be adjustable (e.g. a preset in series with a fixed resistor), that could well be the vertical hold cotnrol In a number of montiros Iv'e weorked on the horizontal frequency control has been an indcutor. But don't confuse htis with the width or linearity coils That said, you may well have a fault rather htna just misadjsutment (my experience, agian, is that adjustments rarely drift). Perhaps the sync circuitry is not working properly. I think the first hting to do is to determine the sort of input to the monitor (is it compostie or seaprate syncs). If the former, then the sync separator stage in the monitor is suspect. If the latter, then start by checing the syc siganls are actually getting to the moitor, and trace on from there. -tony