How do I know if the dots are dust or a failed DMD chip?

Dust dots are usually irregular in shape, slightly fuzzy-edged, and can vary in count over time as airflow shifts the particles. Dead DMD mirrors produce tiny perfect rectangles (pixels) that are consistently the same colour (typically white, green, or black) and never move or vary. We confirm the diagnosis on-site before quoting the clean.

Optical block specialists Since 2007 1 Lakh+ repairs

Black dots on screen?

Visitek V45 or V62 showing black dots fixed in position on the projected image? Dust on the DMD chip. Optical block cleaned, image cleared, same visit.

Visitek V45 / V62 black-dots fix in Hyderabad — ₹149visit charge

Black or grey dots fixed on your projected image?

Black dots on a DLP projector image are almost always dust particles sitting on the DMD chip (the digital micromirror device that creates the image) or on the LCD panels. The dust shadow is magnified by the projection lens into clearly visible dots or blobs. We clean the optical block using anti-static tools and optical-grade lens fluid under clean-room conditions. No chip replacement needed in the vast majority of cases.

WhatsApp 7702503336 Call — Same-Day Fix

Black Dots / Spots Image Haze Contrast Loss Colour Shift Filter Blockage DMD Chip Dust

Book your optical clean

Same-day fix — callback in 5 min

₹149 visit + on-site check

Part you need

DLP projector optical block and DMD chip being cleaned with anti-static tools to remove black dots from the projected image — DLP optical block cleaning — anti-static removal of dust from the DMD chip (digital micromirror device) and surrounding optical elements.

What is actually happening when dots appear

In a DLP projector, the DMD chip (short for digital micromirror device) is a semiconductor the size of a postage stamp covered with millions of tiny mirrors that tilt to create the image. When a dust particle lands on the protective window above these mirrors, it blocks light from that area, casting a shadow that the projection lens magnifies into a clearly visible dot or blob on the screen.

The clean involves opening the optical block (the sealed light-path assembly), using ESD (electrostatic discharge) safe tools and an anti-static environment to remove the dust particle, then cleaning the chip window and surrounding elements with optical-grade lens cleaning fluid. The process is careful but not a chip replacement. In over 90 percent of cases, a clean fully clears the dots.

Service typeOptical block cleaning

Works onDLP and LCD projectors

Tools usedAnti-static, ESD-safe

FluidOptical-grade lens cleaner

Turnaround60–90 min (most cases)

Warranty30 days

Black-Dots Clean Works on More Than Visitek

The optical cleaning technique is the same across all DLP and LCD projector brands. Visitek V45 and V62 were the first models we documented this service for, but we clean dots and haze from any projector. Here are the most common ones we see in Hyderabad.

Visitek V45 / V62 (DLP)

Entry-level DLP projectors. The V45 and V62 are common in Hyderabad homes, small classrooms, and church halls. Being entry-level units, they have simpler optical sealing that allows dust ingress more readily than sealed business-class projectors. Clean results are consistent and permanent until the filter needs washing again.

BenQ / NEC / Sony DLP Projectors

Business and education DLP units. BenQ SX912, NEC NP-VE280, Sony VPL-DX series, and similar projectors occasionally develop dots after years in dusty environments. Same optical clean process; business-class units have a more complex optical block that requires an extra 30 to 60 minutes to access. See cross-links below for these brands.

Epson / Sony LCD Projectors

3LCD panel projectors. On LCD projectors (Epson EB-series, Sony VPL-EX series), dust settles between the three liquid crystal panels and the dichroic prism. Symptoms: fixed dots and a slight colour cast in affected areas. The cleaning approach differs from DLP (no micromirror chip), but the result is the same: clear image after service.

Six Optical Symptoms We Fix in One Visit

Dust in the optical path produces several distinct visual symptoms depending on where the dust has settled. Each symptom maps to a specific location inside the projector.

Fixed black or grey dots

Dots that appear in the same position every time, regardless of the content being projected. Caused by dust on the DMD chip (DLP projectors) or on the LCD panel face (LCD projectors). Size and count depends on the dust particle. A single clean removes all of them simultaneously.

Haze or fog across the whole image

A diffuse greyish veil across the entire projected image, most visible in dark scenes. Caused by fine dust distributed across the optical elements or a thin film on the condenser lens. Contrast and colour saturation are visibly reduced. Deep optical block service resolves this.

Contrast noticeably lower than before

Blacks that used to be deep now look grey. Whites look washed out. The projector has not changed settings, but accumulated dust in the light path is scattering light into the dark areas. Post-clean contrast ratio typically returns to near-original specifications.

Colour shift or muted area

One region of the image is cooler, warmer, or less saturated than the rest. On DLP projectors with a colour wheel (the spinning disc that sequentially filters red, green, and blue light), dust on the wheel itself causes colour non-uniformity. Colour wheel cleaning is included in the deep optical service.

Clogged or dirty air filter

A blocked air filter (the foam or mesh panel covering the intake vent) restricts airflow, raises internal temperature, and accelerates dust ingress into the optical block. We wash the filter with every deep clean and replace it if the foam has degraded. Filter wash is available as a stand-alone add-on at ₹500.

Dots appeared after lamp replacement

Disturbing the chassis during a lamp swap can dislodge accumulated dust and let it settle on the DMD chip. Dots appear after a lamp change even though the lamp itself is fine. Optical clean resolves this without touching the new lamp module.

Black-Dots Optical Cleaning Cost in Hyderabad

Black-dots optical cleaning for Visitek V45/V62 and compatible DLP/LCD projectors starts at ₹1,500 for a standard clean. Deep optical block service with full strip-down starts at ₹3,500. Air filter wash add-on is ₹500. Visit charge is ₹149. 30-day warranty on all cleans. Free fixed-price quote after visual inspection, before work begins. No Fix, No Fee if the dots cannot be removed.

Optical Cleaning Service

Black-dots optical clean₹1,500 – ₹4,000

Deep optical block service₹3,500 – ₹8,500

Air filter wash (add-on)₹500

Visual inspection / diagnosis₹149 visit

Other Projector Repairs

Lamp replacement (any brand)₹5,000 – ₹12,000

Ballast (high-voltage starter) repair₹2,500 – ₹6,500

Power supply board repair₹2,500 – ₹8,000

Cooling fan replacement + thermal clean₹2,000 – ₹4,500

HDMI input board repair₹3,500 – ₹8,500

Visit & AMC

Doorstep visit charge₹149

Free pickup & drop within HyderabadFree

Corporate / school AMC (per unit/yr)₹4,000 – ₹9,000

Clean warranty30 days

How Black-Dots Optical Cleaning Works

From WhatsApp to dot-free image in four steps. Home, classroom, office, anywhere in Hyderabad.

Send a Photo of the Screen

WhatsApp 7702503336 with a photo of the projected image showing the dots. We identify the likely dust location and confirm whether a clean will resolve it, before you commit to anything.

On-Site Visit or Pickup

Engineer visits your address in Begumpet, Banjara Hills, Kondapur, or anywhere in Hyderabad. Portable projectors can be done on-site; ceiling-mounted units are collected and returned same day in most cases.

Anti-Static Optical Clean

Optical block opened under controlled conditions. DMD chip window or LCD panels cleaned with ESD (electrostatic discharge) safe tools and optical-grade lens fluid. Colour wheel cleaned where applicable. Filter washed. Block re-sealed.

Project a Test Image & Pay

A white test image and a dark grey test image are projected before payment. Dots confirmed cleared. You see the result before paying. 30-day warranty. No Fix, No Fee if dots remain.

Why Hyderabad Schools, Offices & AV Owners Choose Us for Optical Cleaning

A canned-air blow through the vents shifts dust around inside the optical block but rarely removes it from the DMD chip. Only a controlled disassembly with the right tools removes the particle from the chip surface permanently.

Anti-Static Conditions

DMD chips are sensitive to static discharge. We use ESD (electrostatic discharge) safe mats, wrist straps, and tools during the entire clean. Compressed-air shops that open projectors without ESD precautions risk killing the DMD chip permanently.

Optical-Grade Cleaning Fluid

Standard isopropyl alcohol leaves micro-residue on optical surfaces and can damage anti-reflective coatings. We use optical-grade lens cleaning fluid formulated for precision optics. No streaks, no coating damage.

Confirmed Clear Before Payment

We project a full-white test image and a dark-grey test image at the end of the clean. You see zero dots before handing over payment. If any dot remains visible, the clean is not complete and we do not charge. Simple as that.

30-Day Warranty

If dots reappear within 30 days, we re-clean at no charge. Dots reappearing within 30 days means the seal on the optical block was not properly restored, which is our responsibility to fix.

Multi-Brand Experience

We have cleaned optical blocks on Visitek, BenQ, NEC, Sony, Epson, Acer, InFocus, and Hitachi projectors. Each brand has a different chassis to open. Experience means the block is opened without cracking clips or losing sealing foam.

On-Site or Pickup

Portable projectors: engineer cleans on-site at your address. Ceiling or wall-mounted projectors: we collect, clean at our Secunderabad workshop, and return. ₹149 visit or pickup charge, waived on combined optical + lamp service over ₹5,000.

Black Dots Fix — Honest Answers

Questions Hyderabad customers ask before booking a projector optical clean. WhatsApp 7702503336 if yours is not covered here.

What causes black dots or spots on a Visitek V45/V62 projector image?+

Black dots fixed in position are almost always dust particles on the DMD chip (the digital micromirror device that creates the image in DLP projectors) or dust between the LCD panels in LCD projectors. The dust shadow is magnified by the projection lens into clearly visible dots. This is not a lamp fault; the lamp can be perfect and dots will still appear.

Is this fixable, or does the DMD chip need to be replaced?+

In the large majority of cases, dots are caused by dust on the chip surface, not damage to the micromirrors. A clean fully resolves them. DMD replacement is only warranted when the mirrors themselves are physically damaged (producing perfect-pixel-sized dead pixels that never move), which is rare.

How do I tell if the dots are dust or a failed DMD chip?+

Dust dots are usually irregular in shape, slightly fuzzy-edged, and can vary in count over time as airflow shifts particles. Dead DMD mirrors produce tiny perfect rectangles of consistent colour (white, green, or black) that never move. We confirm the diagnosis on-site before quoting the clean.

Which projectors does this cleaning service cover?+

The service is confirmed for Visitek V45 and V62 but covers any DLP projector (BenQ, NEC, Sony, Hitachi, InFocus, Acer) and any LCD projector (Epson, Sony LCD) showing the same symptom. WhatsApp 7702503336 with your projector model and we confirm before booking.

How long does the optical cleaning take?+

A standard optical block clean with filter wash takes 60 to 90 minutes at our Secunderabad workshop. For ceiling-mounted projectors we arrange pickup, clean at the workshop, and return same day in most cases. ₹149 pickup charge.

How much does the black-dots cleaning cost in Hyderabad?+

Standard optical clean from ₹1,500. Deep optical block service from ₹3,500. Filter wash add-on: ₹500. Visit charge: ₹149. 30-day warranty. Free fixed-price quote before work begins. No Fix, No Fee if dots remain after the clean.

Will the dots come back after cleaning?+

If the projector is used in the same dusty environment without a clean filter, dust can re-accumulate over months. We replace or wash the air filter as part of the deep clean service. Regular filter maintenance prevents dots returning for 12 to 18 months in normal use.

Which Hyderabad areas do you cover?+

Doorstep and pickup service across all 40+ Hyderabad zones from our Secunderabad store: Banjara Hills, Jubilee Hills, Film Nagar, Somajiguda, Begumpet, HiTec City, Madhapur, Gachibowli, Kondapur, Kukatpally, Miyapur, Ameerpet, Dilsukhnagar, Mehdipatnam, LB Nagar, Uppal, and more.