It clicks but won't turn on. Is it the bulb?

Not necessarily. A clicking sound often comes from the Ballast unit trying to 'strike' (ignite) the lamp. If the Ballast is faulty, it cannot generate the high voltage needed, even with a brand new lamp. We recommend diagnosing the unit before buying expensive bulbs.

Why does it shut down after 5 minutes?

This 'Intermittent Shutdown' is usually a safety mechanism. It indicates either a thermal sensor reading a dangerous temperature (overheating), or a failing capacitor on the mainboard that loses voltage stability as it warms up.

Electrical Fault Diagnostic

Won't Turn On?
Don't Write It Off.

Q: Is it just the fuse in the plug?

While possible, it is rare. If you have changed the fuse and tried a known working cable but the unit remains dead (no standby lights), the internal Power Supply Unit (PSU) has likely failed or the mainboard protection circuit has tripped.

From "dead" units with no lights to intermittent shutdowns and clicking ballasts. We repair the internal Power Supply and Mainboard logic at the component level, saving you the cost of a replacement.

Book Free Diagnostic

Is it the Fuse?

Board-Level Engineering

We replace faulty capacitors, MOSFETs, and fuses on the board—we don't just swap expensive parts.

Identifying the Power Fault

🔌

Totally Dead

No lights, no fan spin, no response to the remote or power button. This indicates a primary failure in the Power Supply Unit (PSU) or an internal fuse blow.

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Clicking Sound

You hear a "click-click-click" sound as it tries to start, but the lamp never lights. This is the Ballast Unit failing to generate the ignition voltage required to strike the bulb.

⏱️

Short Run & Cut Out

Runs fine for 5-10 minutes, then shuts down unexpectedly. This is often a Mainboard Component failure (like a capacitor) or a thermal sensor cutting power falsely.

Technical Insight

The "Power Chain" Explained

A projector doesn't just have "a power supply." It has a complex chain. Mains power enters the PSU (Power Supply Unit), which converts AC to DC voltages (380V for the lamp, 12V/5V for the motherboard).

The Mainboard then sends a signal to the Ballast, which boosts voltage to over 5,000V for a split second to ignite the mercury vapour in the lamp. If any link in this chain breaks—a dried capacitor in the PSU, a shorted MOSFET on the mainboard, or a weak ignition coil in the ballast—the system triggers a "Protection Mode" shutdown.

The Economic Reality: Manufacturer replacement boards often exceed £400, rendering repairs via standard channels uneconomical. Our component-level engineering restores your existing board. While this involves skilled diagnostic time and logistics, it remains the most cost-effective solution for high-specification projectors compared to the high capital cost of a new machine.

Our Electronics Repair Protocol

Precision diagnosis using oscilloscopes and thermal imaging.

Voltage Rail Testing

We don't guess. We test the 12V, 5V, and 3.3V power rails under load to ensure the PSU is delivering stable current without "ripple" or voltage drops.

Component Replacement

We use high-grade Japanese capacitors (Rubycon/Nichicon) and industrial MOSFETs to replace failed components, often exceeding the original specification for longevity.

Ballast Reconditioning

If the lamp won't strike, we rebuild the high-voltage ignition stage of the ballast, restoring the ability to light the bulb reliably on the first try.

Soak Test

The repaired unit is cycle-tested (turned on and off repeatedly) and run for 24 hours to ensure thermal expansion doesn't trigger intermittent power faults.

Common Questions

Is it just the fuse in the plug?

It's the first thing to check! Swap the power cable with a known working one (like a PC monitor cable). If the projector still has no standby lights, the issue is internal. Internal fuses are soldered onto the PSU board and require disassembly to replace—usually indicating an underlying short circuit that blew the fuse.

I put a new bulb in, but it still won't light up. Why?

This confirms the bulb wasn't the problem. The issue is likely the Ballast Unit (which powers the bulb) or the Mainboard (which tells the ballast to fire). If the ballast is weak, it can't "strike" the arc in the new bulb. We can repair this module.

Why does it work when cold but fail when warm?

This is classic "Thermal Expansion" failure. A hairline crack in a solder joint or a failing capacitor works fine when cold, but as the unit heats up, the connection breaks or the component drifts out of spec, causing the mainboard to cut power for safety.

Get Your Power Back

Don't risk electrical safety or further damage. Let our engineers diagnose the fault for free.

Book Free Assessment

Won't Turn On? Don't Write It Off.