Projector No Signal
& Input Repair.
A working projector is useless without an image source. We specialise in micro-soldering broken HDMI ports, diagnosing HDBaseT network failures, and rebuilding proprietary Barco and Christie input modules.
Why Do Projectors Lose Signal?
If your projector powers on and displays its internal menu, the optics and lamps are perfectly fine. The fault lies strictly in how the mainboard receives, decrypts, and scales the incoming video data.
Physical Port Damage
The most common fault. Someone trips over a trailing HDMI or DisplayPort cable, wrenching the port. This tears the microscopic copper traces off the mainboard. We use micro-soldering to rebuild these tracks and fit a new socket.
EDID & HDCP Handshake
Your source device and the projector must "shake hands" to agree on resolution (EDID) and copyright protection (HDCP). If the transceiver IC chip on the projector burns out, this handshake fails, resulting in a permanent blank screen.
Scaler IC Failure
Once the signal enters the board, it must be scaled to fit the projector's native resolution. If the scaler chip overheats, you may get vertical lines, distorted colours, or "Format Not Supported" errors.
HDBaseT Network Drops
In corporate environments, video is often sent over CAT6 cable via HDBaseT. Power surges through the network can blow the receiving Valens RJ45 module on the projector, causing intermittent drops or total signal loss.
Before Booking: Always test your projector with a completely different source (e.g., a Blu-Ray player instead of a laptop) and a brand new, short (1-metre) HDMI cable. Over 30% of "No Signal" issues are caused by faulty cables or degraded wall-plate extenders rather than the projector itself.
Standard Input Topologies
We repair connectivity modules across all major projector brands, bypassing the need for an expensive complete mainboard replacement.
HDMI & DisplayPort
Consumer & Pro AV
HDMI ports carry 19 delicate pins. The mechanical leverage of a heavy cable often rips the port from the PCB, taking the copper mounting pads with it.
Our technicians utilise hot-air rework stations under microscopes to reconstruct broken PCB traces. We then install reinforced, through-hole HDMI sockets that are physically stronger than the original factory surface-mount components.
HDBaseT & LAN
Corporate Infrastructure
Large venues and lecture halls rely on HDBaseT to send uncompressed video over 100 metres of CAT6 cable. Because these networks are extensive, they are highly susceptible to electromagnetic interference (EMI) and power surges.
A surge will instantly destroy the Valens HDBaseT receiver chip on the projector's mainboard. We desolder and replace these specific BGA/QFN chips, restoring long-distance video capability.
Large Venue & Cinema Interconnects
Proprietary input boards on Barco and Christie systems cost thousands to replace. We provide component-level BGA rework and transceiver replacement to save your budget.
Barco ICP / ICMP
Cinema Media Processors
The Integrated Cinema Processor (ICP) and ICMP modules in Barco DP2K/DP4K projectors manage secure DCI-compliant content. Physical removal or backplane degradation often triggers severe communication errors (e.g., Error 5555).
We diagnose fractured solder joints on the high-density BGA processors and repair the backplane interface connectors. We also assist with necessary "Marriage" security resets required after hardware intervention.
Christie TruLife™ Input Cards
Boxer & Griffyn Series
Christie's modular TruLife platform utilises twin/quad DisplayPort and 12G-SDI input cards to process massive 4K 120Hz bandwidths. Hot-plugging cables into these active systems can blow the surface-mount transceiver ICs.
Instead of replacing the entire £2,000+ input card, our lab identifies the specific blown SDI equalizer or DisplayPort receiver chip and performs precise hot-air rework to restore the channel.
Barco Pulse Input Boards
UDX & F-Series
The Barco Pulse ecosystem unifies processing across their high-end laser fleet. Input boards handling HDMI 2.0 and HDBaseT are prone to static discharge damage during live event rigging.
We repair the input conditioning circuits and replace damaged HDMI multiplexers. If the board suffers a firmware crash (boot loop), we use proprietary JTAG tools to rewrite the FPGA bootloader.
3G/12G-SDI & Broadcast
Live Event Rigging
High-end rental units rely on locking BNC connectors for SDI video. While the connectors are robust, the internal signal pathways can fail to lock onto high-framerate broadcast signals.
We repair damaged SDI input cards, replacing blown SDI reclockers and cable equalizers, ensuring your projector syncs perfectly with your vision mixer or media server.
Frequently Asked Questions
My projector says 'No Signal' but the cable works on my TV. Why?
This usually indicates a failure on the projector's mainboard. It could be a damaged scaler IC, a blown HDMI transceiver chip, or an HDCP (High-bandwidth Digital Content Protection) handshake failure. We can repair the logic board to restore the signal path without replacing the entire board.
Can you repair a physically snapped or loose HDMI port?
Yes. If a cable was yanked and snapped the port, we use precision micro-soldering to remove the broken port and install a brand-new, often reinforced HDMI socket directly onto the mainboard. This is significantly cheaper than a manufacturer board replacement.
My Barco projector has lost communication with the ICMP. Can you fix the input board?
Yes. Communication loss between the chassis and the Integrated Cinema Media Processor (ICMP) or ICP is a critical fault. It often stems from a backplane connection failure or a BGA solder fracture on the input module. We provide component-level diagnostics to restore communication.
The projector turns on and shows the menu, but no picture from my laptop. Is the bulb broken?
No. If you can see the projector's internal menu (like settings or the manufacturer logo), the lamp and optical engine are working perfectly. The fault lies entirely within the input processing stage on the mainboard.
Don't Throw It Away.
A broken HDMI port or a faulty mainboard does not mean your projector is dead. By repairing the board at the component level, we can revive high-end home cinema and professional AV units for a fraction of the cost of an OEM module replacement.