Light Box & Cabinet Sign Repair

Light Box & Cabinet Repair in NYC & NJ

Cabinet signs and light boxes are the workhorses of commercial signage — reliable, versatile, and highly visible when properly maintained. But like any sign, their internal lighting, face panels, seals, and components eventually need attention. A dark or dim cabinet sign is one of the most common sign repair requests we receive.

We repair all cabinet sign styles: single-face, double-face, wall-mounted, pole-mounted, and freestanding. Whether yours runs on fluorescent, LED, or a mix of both, our technicians know the internals of every configuration and carry common replacement parts on our trucks.

Light Box & Cabinet Sign Repair Services We Provide

Our light box & cabinet sign repair services cover the full range of issues you might encounter. Here’s a detailed look at what we handle:

Internal lighting repair (fluorescent and LED)
LED retrofitting
face panel replacement
seal and gasket replacement
access door repair
ballast and driver replacement
full rewiring
structural repair
mounting hardware service
timer and photocell installation

Light Box & Cabinet Sign Repair Issues We Fix

These are the most common light box & cabinet sign repair problems our technicians see — and exactly how we fix each one.

Internal Lighting Failure

The most common cabinet sign issue. Fluorescent tubes burn out, LED modules fail, ballasts die, and drivers degrade. The result is a sign that's either completely dark or has visible dark spots and uneven illumination.

Cracked or Discolored Face

Cabinet sign faces are typically acrylic or polycarbonate panels with printed or vinyl graphics. UV exposure causes yellowing, brittleness, and cracking. Damaged faces reduce light transmission and look unprofessional.

Seal & Weatherproofing Failure

Cabinet signs rely on gaskets and seals to keep moisture, insects, and debris out of the interior. When seals degrade, water gets inside and corrodes connections, shorts components, and damages the face from behind.

Access Door & Hinge Problems

Service access doors on cabinet signs can warp, corrode, or have their hinges fail. A door that doesn't close properly lets moisture in and can become a safety hazard in high winds.

Ballast or Driver Failure

Fluorescent signs use ballasts; LED signs use drivers. Both are power regulation devices that degrade over time. Symptoms include flickering, buzzing, reduced brightness, and eventual complete failure.

Wiring Degradation

Internal wiring in cabinet signs is exposed to heat from lighting components. Over years, insulation degrades, connections loosen, and wiring becomes brittle. This can cause intermittent failures and, in extreme cases, fire risk.

How to Get started

Our Partners

Get a Free Light Box & Cabinet Sign Repair Quote

Tell us about your sign and what’s happening. We’ll respond within 24 hours with an assessment and estimate — no obligation.

Request Your Free Quote

We respond within 24 hours.

Need emergency repair?

Call 718-476-1900

Frequently Asked Questions

Should I convert my fluorescent cabinet sign to LED?

In most cases, yes. Fluorescent tubes and ballasts are the most common failure point in cabinet signs, and they require frequent replacement. LED modules last 5-10x longer, produce brighter and more even light, and use 50-70% less energy. The retrofit pays for itself through reduced energy and maintenance costs within 1-2 years.

Can you replace just the face panel without rebuilding the whole sign?

Yes. Face replacement is one of our most common cabinet sign services. We remove the old face, inspect and service the internal lighting while it's accessible, and install a new face with fresh graphics. The cabinet structure and electrical system stay intact.

My cabinet sign has dark spots even though it's not completely off. Why?

Dark spots indicate individual component failures — specific fluorescent tubes or LED modules that have died while others still work. It can also indicate hot spots from failed ballasts that are only powering part of the array. We diagnose which specific components have failed and replace only what's needed.

How do I know if moisture got inside my cabinet sign?

Signs of moisture intrusion include: visible condensation on the inside of the face, rust stains visible through the face, intermittent electrical failures (especially after rain), and insects or debris inside the cabinet. If you see any of these, call us — moisture damage gets progressively worse and more expensive if not addressed.

How often should cabinet signs be serviced?

We recommend at least annual inspection for most cabinet signs — more frequently for signs in exposed locations. Each service visit includes internal cleaning, component testing, seal inspection, and face condition assessment. Regular service catches issues early and prevents the cascading failures that lead to expensive repairs.

Need Help With Your Sign?

Our team is ready to answer your questions and schedule a visit. Most issues can be diagnosed and quoted over the phone.

Hours of Operations

Monday – Friday: 8am – 6pm

24/7 emergency service available