Dear all,
this TV, Hisense H60N5705 installed in a conference room, turns off automatically a few minutes after being switched on.
The problem started to occur suddenly, during a video conference. It was switched on with the remote control, continued to work for a while and then switched off again.
The room technician changed the power cable (?), the HDMI cable (??) but the problem of course remained.
I asked if it changes anything by connecting the TV to another source but, even if it is left on the OSD menu, it stays on for a few minutes and then switches off.
So they took the TV (a 60’ which is not easy to handle) to the lab and asked me to check it.
I still have to open it up, but I don't have the schematic diagrams and should proceed by trial and error, although I imagine a problem with the power supply stage.
How do you suggest I proceed, since I don't do TV but RF ?
Thank you for any help,
Best
Maximus
Opening the TV, I did not found any broker CAP in the power supply stage, nor burnt or open component.
With the TV is switched on, temperature of single components are in the range of 35-40 °C, only the radiator shield is close to 46 °C.
When the TV switches OFF, there is no noise or sparks visible.
I would proceed by replacing ALL the electrolitic caps in the PSU unit...
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Hi,
Backlight ?
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How can I check it?
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