LG ph150G projector =no signal from hdmi/sharescreen
after power on, only shows blue backround with lg logo,
when choose sources
1) hdmi
2) sharescreen option with android LG smartphone
usb drive playing - good
after attempts to connect - shown just “NO signal” message on picture.
i`m disassembling device and wash main pcb with alchohol and warming it in owen with 200 С* at 10 minutes (for “resoldering fix effect” ) .
after assembling - power on and no any effects, the problem doesn`t fixed. all the same.
need help.
regards
Questa è una buona domanda?
5 Commenti
Remember, 95% of the time the troubleshooting solution is quite simple. Why people jump at drastic solutions I will never know???
You did what? Where did you get the idea to do that? You will be lucky if no further damage occurred. There is never any need to "wash" a PCB with a 99 to 100% alcohol - you don't say what concentration you used.
A concentration of 75%, which is used to disinfect, has ~25% water which is a conductor of electricity and will leave mineral deposit unless distilled water was used.
And as for the oven . . . ???
I do not clearly understand which device you are having trouble connecting with. The USB drive? The phone? Which?
Have you read over the manual carefully?
https://www.lg.com/us/support/product/lg...
Have you checked cables and connectors?
da mike
@aactech
sorry for 1st not full & correct info.
so
device was disassembled & found
dried drops similar to coffee on pcb
board was washed in order
soft toothbrush used
1) glass cleaner
2) flux cleaner
3) simple water
i know about "pcb washing rule - disstilled water" - but i forgotten
about "owen" :
i found video on youtube. 1 man fixed no working hdmi in of led LG tv pcb succes good result
i do not have Thermo soldering IR table it reason for owen method
i know about thermo specs of smd/chip almost all not over 250 C`.
"I do not clearly understand ...?"
problems:
1) no signal
when phisically to hdmi cable port using laptop and other pc - ports is checked
the icon of hdmi source on PJ active
possible see running dots when attempt
2) no signal when choosed "share screen" source on PJ - connection whith LG phone android 9
used setting of 2.5 hz / different options of Group N channels
manual reading and searching carefully
hdmi cable exactly verifed, works whith tv box.
da Ricardo Tozzi
@bel_karnel
After the oven treatment it is hard to say. Perhaps look for a schematic for its mainboard. Apart from that I can't help
da mike
thanks, please advice, were i сan find schematic diagram for device?
(my searches finished with fail).
da Ricardo Tozzi
@bel_karnel
Hi Ricardo, I looked for a schematic as well, Sorry no luck. It is a low-end projector.
da mike