Hi,
I have Wimius P20 projector given to me by friend that would not turn on. I have verified all the fuses, and voltages, and verified that 5V and 14V are going to the main board. But indicator LED is not coming on.
I have visually inspected the board and nothing suspicious cis coming out. There was some whitish deposits on the HDMI connections on the board, but after cleaning with IPA all cleaned up, and there are no signs of damage.
I have watched many repair videos on YT and kind of understand troubleshooting process, but for one, there is almost none for this Wimius P20, nor any documentation on the board or any service manuals.
I do not have thermal camera, but tried to use touch method, and only one section is getting hot, not right away, but after a minute or two, it starts feeling hot, it is Inductor labeled 4R7 (also labeled L4 on the board) and not sure what it is, but most likely some voltage regulator, labeled i206 (or 1206 with dot on top of the one and underline under 0), also labeled U102 on the board.. It is SMD component in SOT-23 with 5 pins (picture attached).
I have measured voltages... and output voltage is 0.7 volts, same voltage that goes to the controller board where "Power ON" button is and indicator LED (which does not turn on).
As You can see from the picture, there are 2 same SMD components on the board, and same Inductors, but the other oned does not get hot. And output voltage on that regulator is 1.2 V. Both have input of 5V.
If you can help me identify this component, and maybe I can make sense of the measurements, and help me find the short (which I believe it is), and point me to the right direction.
P.S. My brother was into electronics, and he was great help to me, but he recently passed, and I have no where to turn for help on this mater. And you can ask your brother stupidest questions without being judged, so sorry if I misuse this forum.
Thanks,
Vesko