Fixing an LCD monitor - stays on for two seconds

If this is off topic please move it to the right board. So I had an off brand LCD monitor whose manufacturing date is unknown to me, lets say its 5 years old. It would turn on for several seconds and then shut off. I read up a little and found a trick to reduce the brightness. Working with a menu for two seconds at a time is tricky, but I eventually notched the brightness down to zero and guess what - it stayed on! It was just really dim. What I read may be a cause of the is a bad / dying capacitor. So I popped it open and scrutinized every capacitor to look for bulges, brown areas and / or leaking electrolyte and nothing.

My question is: are there any other replaceable components that may cause the issue I described? Is there another way to find a defective capacitor without unsoldering and dsicharging / testing every one on the board? Signs are pointing to me throwing it in a dumpster

that is more likely an inverter or backlight than a cap? so you don't have a model at all for it?

Its made by "TPV Electronics co", very generic looking, model T1780PI. Could it still be a backlight if it was at full brightness before? There was no flickering or dimness until i turned down the brightness, then it stayed on past two seconds.

i don't know enough about monitors to know sorry. i bet it is the backlight though as it does not flicker at all right its just dark? probably cheaper to get a new monitor then repair it.