It is loosing Focus...
you will have to open it up, to refocus the monitor...
but be carefull, there are HIGH VOLTAGES underneath the HOOD of that baby...
if you do not feel up to par on this, take it to a local Electronic Repair person/shop and have it done...
The Focus Mechanism, is usually found on a black block, which has a thick cable running to the top of the CRT... it will usually have a turn type knob with a slit for a screwdriver...
this is located usually at the back left side (viewing from the Screen)...
