⟐ Commented juni 19, 2025 at 11:48 MST

Blue power light when plugged in.

Press power button, blue power light stays on, blue status light starts blinking. Fan spins up normally, but bulb never lights up. Status light keeps blinking for about two minutes and then projector turns off, blue power light still lit. No reaction from any button press after initial power button press.

Have tried changing the bulb, no difference. Have had it open, removed and mounted the ballast board in another known good EB-475 I have, as they are practically the same. Ballast works fine. Power boards not identical, so can't try exchanging them.

I have done some more Research. All thermistors (temperature sensors) are Reading about the same resistance, 11.5k ohms. The Power supply seems to work properly, no bad caps or visible damage. Output voltage to the mainboard seems to work properly and Readings are consistent. The fans turn on and no fault lights when Power button pressed. Input voltage to ballast is 373V DC, which seems right. Tried changing ballast also the other way round from my other known good similar projector, and there is no change starting it With a known good ballast. Tried putting the bulb into the other projector, starts properly and lights up.

I’m really running out of ideas.

Had it been the safety switch, it should have cut all Power, not allowing the projector to start at all.

There is no voltage going to the bulb, so there is something in the Logic not letting it start.

I can not stop the projector again by pressing Power off two times, which would be the normal routine, which leads me to think the machine doesn’t start properly. Any ideas? Hard reset routines or computer diagnosis port would be helpful.

⟐ Commented augustus 12, 2026 at 13:15 MST

I have some problems with my BenQ TH683. One of the fans stopped working, causing the TEMP and POWER LEDs to light up red. The manual states that the projector shuts down the system once one of the fans is not working properly.

I ordered the exact same fan with all the necessary specifications, but today, when I started the projector again, it shut down after about half a minute and showed the red TEMP and POWER LEDs again.

Is this still somehow fixable, or could there be an error somewhere in the system itself? No thread on the internet could help me, so maybe some of you have had the same problem before.

⟐ Commented juli 07, 2026 at 6:00 MST

.I found this video but it is for a W1080 model and maybe different inside

⟐ Answer edited juli 14, 2026 at 7:48 MST

⟐ Commented juli 04, 2026 at 22:03 MST

The Power and Status lights are both lit solid blue, which normally indicates standard operation. The lamp light appears to be a "dim blue," though the lamp itself is clearly firing as light is hitting the wall.

I have already tried:

1. Hard resetting the unit by unplugging it for over 60 seconds.

2. Checking the physical A/V Mute slide to ensure it is fully open.

3. Cycling through sources using the physical buttons.

4. Pressing the Menu button multiple times (no menu appears on the screen).

I do not have the remote control for this unit. Is this likely a failure of the main board, a stuck Auto Iris, or a disconnected internal ribbon cable? Are there any button combinations I can use to force a factory reset without a remote?

Projector: Formovie Xming V1 Ultra

What parts suppliers would potentially have stepper motors?

⟐ Commented april 03, 2026 at 12:36 MST

⟐ Commented maart 25, 2026 at 13:31 MST

⟐ Answer edited februari 10, 2026 at 13:07 MST

The Symptom:

When I connect the power cable, the small LED indicator on the front lights up. However, the projector does not actually turn on. When I press the power button on the remote, the LED blinks/flashes in response, but the fan doesn't spin up and there is no light output from the lens.

What I've tried so far:

• Checked the power cable and adapter (using the original Samsung 65W USB-C brick).

• Tried a different wall outlet.

• Attempted to power it on using the button on the unit itself, but it still won't boot.

Is this a known mainboard failure, or could it be a software hang that requires a specific hard reset sequence? Any advice on which internal components I should check or test with a multimeter would be greatly appreciated.

Thanks in advance!

⟐ Commented december 02, 2025 at 1:53 MST