BenQ HT3550: problems, parts and running costs
Checked: 2026-10-21
Summary
The HT3550 is a 2019 lamp-based 4K UHD home-theater projector that was discontinued in July 2023, and the owner complaints that repeat are mechanical: a loud growl for 60-90 seconds at startup, a constant lower growl from the fan or the pixel-shift mechanism, and stuck white pixels after 11 months that only a DMD chip replacement cleared. Keeping it running costs a 245 W lamp rated 4,000 hours in Normal, 10,000 in ECO and 15,000 in SmartEco, with the replacement part quoted at $149 in 2019, plus electricity at 330 W typical. Around $1,199 it is a reasonable buy for a dark dedicated room at 90-100 inches; above $1,499 the same money buys a brighter machine, and for competitive gaming it is the wrong projector at any price because measured input lag is 47-63 ms against 34 ms on the spec sheet.
Common problems and fixes
- Stuck white pixels that need a DMD chip swap — white pixels appeared after 11 months and would not clear, and BenQ replaced the DMD chip under warranty on that same 16-month-old unit, after which the owner said the picture was “clearly much better”. A chip fault inside the warranty period was handled that way once; the sources set no repair timeline beyond it. [4]
- Colour and HDR numbers depend on two menu switches — with Brilliant Color on and Wide Color Gamut off, ProjectorCentral measured 59.2% of DCI-P3 color volume in HDR mode; Wide Color Gamut on raised that to 76.4%, and Brilliant Color off reached 105.6% at the cost of brightness, with peak white at 70.7 nits with both switches on and 119.9 nits with Wide Color Gamut off. Set the switches before judging the picture. [4]
- Placement limits: 1.3x zoom and vertical shift only — there is no horizontal lens shift, only +10% vertical shift, no lens memory and no networking wired or wireless, and the built-in USB media player is impractical when the unit is ceiling mounted. A 100-inch image needs 8.2-10.7 ft of throw, 120-inch needs 9.9-12.8 ft and 150-inch needs 12.3-16 ft, so measure the room before mounting. [2][4][9][10]
- 8-bit at 4K 60 Hz, faint banding, and no Dolby Vision — video processing is 8-bit at 3840x2160 60 Hz, 16-bit input is accepted only at 24 Hz and 30 Hz, and ProjectorCentral saw faint banding hints in a 10-bit HDR grayscale test animation. The supported HDR formats are HDR10 and HLG, Dolby Vision is not on the list, and 3D needs Full HD DLP-Link glasses that are not included. [1][2][4]
Parts and consumables
- Replacement lamp 5J.JKC05.001 — 245 W lamp quoted at $149 by ProjectorCentral in 2019; rated 4,000 hours in Normal, 10,000 in ECO and 15,000 in SmartEco, and owners replace it once those hours are used up. Because the model was discontinued in July 2023, supply for future years is an open question, and the hours already on the lamp decide how soon you pay again, so check the lamp-hour counter on a used unit. [4][5]
Yearly running cost
The lamp is the running cost. It is rated 4,000 hours in Normal, 10,000 in ECO and 15,000 in SmartEco, and the replacement part 5J.JKC05.001 was quoted at $149 by ProjectorCentral in 2019. Electricity is the other line: BenQ rates typical consumption at 330 W at 110 V with standby under 0.5 W, and the 2x 5 W built-in speakers are no substitute for a sound system, so expect to feed a 3.5 mm audio out or HDMI ARC from an external amplifier. The research files give no electricity price and no viewing hours, so a per-year dollar figure cannot be computed — not enough data. The only documented money is the $149 lamp quote from 2019, an old-stock figure for a model discontinued in July 2023.
When it is a good buy
ProjectorCentral’s model hub lists the HT3550 at $1,199 (2026-10), against a $1,499 launch and review price (2019) and a $1,699 MSRP (2019). [4][5][6]
- At or below $1,199 — the defensible zone for a dark dedicated room at 90-100 inches, where the measured colour accuracy and contrast hold up and both labs still called it good value at launch. [4][5][6]
- $1,200 to $1,499 — you pay the 2019 launch price for a 2019 product; acceptable only with the measured brightness shortfall and the input lag in mind. [4][9]
- Above $1,499 — weak, because the same money buys more light: the Epson HC4010 lists at $1,999 (Projector Reviews, 2019). [9]
Named alternatives:
- Epson HC4010 — $1,999 list and brighter; the better pick when the room has ambient light or the image goes past 100 inches. [9]