Professional Canon EOS-1D Mark IV Repair

Labor rates exclude spare parts. Whenever possible we repair at the component level. Priority repair option available.

• Full diagnostics – $0 if repair approved / $65 if declined
• Express turnaround (same day) – +50% to service price
• No power / shutdown issues – from $185
• 3.0″ rear LCD replacement – from $145
• Status LCD replacement – from $150
• Shutter assembly replacement (up to 300k actuations) – from $250
• Mirror box service / sub-mirror fix – from $165
• AF sensor cleaning & calibration – from $135
• Hot shoe & sync circuit repair – from $95
• CF/SD slot pin rebuild – from $115 (CF) / $100 (SD)
• USB / HDMI port replacement – from $120
• Dial, buttons, joystick repair – from $105
• Weather-seal renewal (gaskets, doors) – from $95
• APS-H sensor cleaning + calibration – from $75
• Deep body cleaning (ports & exterior) – from $65
• Battery compartment / latch repair – from $85
• Shell / top cover replacement – from $180
• Main PCB / power regulation repair – from $195
• Firmware reflash / boot recovery – from $100
• Lens mount rebuild (EF bayonet) – from $135

Prices vary by condition and part stock. All repairs include stress-testing and a service warranty.

• AF misses in AI Servo – AF recalibration and mirror sub-assembly service.
• Err 20/30 during bursts – shutter assembly or flex cable replacement.
• LCD ghosting or lines – module replacement with resealing.
• CF pin bends or read errors – slot and controller rebuild.
• Random shutdowns – battery rail diagnostics and power board repair.

• Stick to UDMA 7 CF cards; avoid adapters for reliability.
• Update to latest firmware for AF refinements and card compatibility.
• Store LP-E4N batteries partially charged if unused long-term.
• Replace seals after heavy rain or dusty shooting to maintain weatherproofing.
• Clean hot shoe and terminal covers regularly to prevent contact issues.

1. Camera does not turn on even with a charged battery.

We check LP-E4N battery health, fuse rails, and DC-DC converters. If needed, the main board or power circuits are reworked.

2. Autofocus hunts or misses during continuous shooting.

We service the AF sensor, adjust sub-mirror alignment, and run full AF calibration with reference lenses.

3. Err 20 or Err 30 occurs in burst mode.

These codes usually indicate shutter or mirror faults. We replace the shutter assembly and inspect flex cables if necessary.

4. Rear LCD shows ghosting, lines, or dead zones.

We replace the LCD module, reseal the housing, and test for uniform brightness and contrast.

5. CF card not recognized or pins bent.

We rebuild the CF slot, replace damaged pins, verify controller integrity, and test with UDMA 7 cards.

6. Camera freezes or displays Err 70/80 during use.

We run diagnostics on the main PCB, refresh firmware, and rework memory and processing circuits if unstable.

7. Hot shoe does not trigger external flash reliably.

We clean and re-solder hot shoe contacts, replace cracked boards if needed, and calibrate flash sync timing.