I bought the 24 mp version of this camera last year.  It has some issues but I was able to work around them, it's reasonable for the low cost I guess.  I use it very frequently for IR filming.  Today the IR light stopped working.  Normally when I switch to IR and turn off the room lights, the IR fill lamp turns on automatically, but now it just stays 
off.  The fill lamp indicator doesn't appear on the screen either.  It also doesn't turn on the white light for daytime use in low light.  I assume the light sensor below the lens) has stopped working.  Is it possible to override the sensor and turn on the fill lamp manually?  I have tried a factory reset.  I have electronics repair experience and 
might be able to fix it myself but it looks difficult to take apart, I could use a service manual if you have one?