old 19" LG CRT Monitor doesn't start

[albertino]

Hello,

I've an old 19" LG CRT Monitor that when I push the start button it loops (a single click is normal) with the "click" and doesn't display anything else.
The monitor is attached correctly to a normal computer.
I've tested several things without success.

Thank you in advance for your help!

[Justmanuals]

1- You've failed to mention the model number.
2- You mentioned you tested several things but you fail to mention which ones.
Don't you think this information would help?

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[albertino]

I'm really sorry for my manners! You are completely right, I've not posted the minimum information to you all!

I'm new to monitor repairing and in general to repair anything! I've only repaired few things in my life (some notebooks, some printers/mfc/copier, just one monitor).
1) LG flatron 774FT (FB774C-CP)
2) I've tried anything that I know (not everything possible, I'm sorry), Basically I've tried to find eventual dry joints on the board attached to the crt. I've tried to change the HR with a compatible one but without luck. Checked the parts after the attach of the power cord.