Turn on benq pb6200 with new bulb all I get is humming and no led

It's important to know what color the lights are also.
Open this PDF and search for "stand by"

Your correct about missing your primary color. this could be either your cable or the connection at the projector could have a bent pin on the port. not sure what your trying to display computer?

if there are no leds lit, replace the power supply. if there are, and the fans are on but no light, it's the colorwheel.

if there are no leds lit, replace the power supply. if there are leds and you get fans but no light, replace the colorwheel.

it's not the lamp. if you've replaced the cords and still have the problem, reset the settings to factory default to make sure the resolution matches. if still not ok, there may be an issue with the main board.

time for new lamp bro!!

The projector lamp is BenQ part number 60J8618CG1. You can download the manual at http://safemanuals.com/user-guide-instructions-owner-manual/BENQ/PB6200-_F

Mine needed a "fan module" replaced. The part number is 60.J8613.011.

Cost was $60, plus $100 for labour.

Hi there

I replaced a Mainboard on a BenQ PB6210 just yesterday - had all the same symtoms.

No LED lights coming on but the rest of the buttons has light.

Tried every other component from the lamp to the colourwheel , but the Mainboard replacement fixed it in the end.

You'll be looking at about $95 for the part

I fixed the exact same problem on my PB6200. Both back fans were not working, and the bulb would not turn on.

In my projector, the fan board had a bad capacitor. The fan board is the one where all 3 fans are connected, and which is facing upside down on top of the powerboard. The bad capacitor on my projector was coded C7302 on the schematics. It's a brown, 25v 470uf capacitor.

I recommend you to open your projector, unplug all connections to the fan board, turn it upside, and inspect the capacitors and other components. Bad capacitors have a bulge and/or a black stain or fluid coming out on the top. You can find pictures on the net.