Thanks for the good video - pretty interesting. I did disasamble my screen already, but could not find any issue. The capacitors look good and measure okay, the IC you have, it is not in my screen Power Supply. But it has the same phenomen that you describe - it works sometimes for up to 20 minutes, sometimes it crashes after 20 seconds. But I am out of ideas. I think it is not a heat issue, more a component that runs out of its specifications.. any candidates what to check on the HP LA2405 models?

Its easier to just replace the power control board, but its awesome to learn about BLR! Did you also test a few other components? Thank you for a great video! 🤓

Thanks bro just solved it yesterday got the ic around 65 rs in Hyderabad, actually my mom was throwing out the monitor. It was dell 1920b

After change ic problem not solve after 2-3min swich off the monitor My monitor also same problem

When you say it turns off, do you mean the screen goes black and the power light stays on, or does the power light go out as well? My power light stays on when the screen goes black, and I'm wondering if that means it's a different problem.

hi dear my monitor power board dos't have top 258. my monitor make is NEC. so what can i do? plz reply

Nice , i have problem like this ,i will relace it and see what happining ,

I did change the IC TOP258PN with the same but monitor doesn't work

Is the logic board available

My monitor has an external power supply. Every change I had made, changed the shut down problem by a bit. I tried everything. But just recently, If I pickup the power supply brick, the monitor would turn on again, but then after a bit, it would turn off again. If I didn't touch it after that, the monitor stayed off. So my last guess was that the power supply was at times current limited, and that the cause was a poor connection to the AC line. The AC line is plugged into the power supply brick. So I pulled the AC cable in one direction to see if that helped by forcing a better connection from the AC input socket to the internal PCB. No luck that time. Then I forced it in the opposite direction, and bingo, the monitor stayed on. For now, I have just pulled the cord in that direction and have kept it like that by taping the cord to the power supply brick on one side. If I would have looked at the DC output voltage with my oscilloscope in the first place, I would have noticed this brief intermittence long ago, but I was using my voltmeter instead. Voltage was fine, but of course there was a momentary drop in voltage for a fraction of a second just when the monitor turned off, which of course the meter did not catch. Holy crap. I hate intermittent problems, and other heat related problems. At one point I had disassembled the monitor and then it would not work at all. Then, just for the heck of it, I re-assembled it and hooked it back up to my computer, and now it worked, for about a week. In each of these cases, I obviously had left the AC cord in a slightly different position, thus changing the maximum current flow a tad bit

Do i need to replace it?

Hai sir I had same problem with my monitor I replaced ic top258p But now it's not switching on Plz support me help

Bro still same turn off after replace top285

Dude! You constantly move the camera AND move the card which is the object shot. You caused me such a headache, I could not watch pass the 2 minutes mark. Just keep things steady next times. Please!

shaking camera made me vomit