The situation is something like the following: https://www.reddit.com/.../white_beam_after_turning.../...
(I did not upload the original picture of my monitor because it might cause burn marks on the phosphor if I try to recreate the same for illustration)
I have attached the suspected section...
I have many Samsung SyncMaster 753s Monitors. But in most of them, I guess the focus has become thermal sensitive. The focus drifts over time. The focus does not remain constant over hours of usage. (This is not the case with later model models of Syncmaster, for example, 793s, which I also...