Why does an Icom IC-880H display flash briefly, click loudly, then power off?
Answer
A brief display flash with a loud click and shutdown on an IC-880H usually points to a power-supply, fuse, wiring, or internal protection fault—not a menu setting. Verify DC voltage and polarity at the radio, inspect the power cable and fuse, then try a known-good 13.8 V supply before assuming the radio needs service.
Before you start: stop right away if…
- Incorrect DC polarity or shorted power leads can damage the radio and create a fire or burn hazard.
- Do not bypass fuses or substitute a higher-rated fuse to force the radio to stay on.
Follow these steps
Inspect the DC cable and fuse
Power everything off. Check the IC-880H power leads for frays, loose ring terminals, and a blown fuse in the fuse holder. Replace a blown fuse only with the same type and rating specified for the radio.
You should see: The cable and fuse look intact, or you find an obvious power-path fault.
Confirm voltage and polarity at the radio
With a multimeter, measure DC voltage at the radio end of the power cable while the supply is on. Confirm roughly 13.8 V (typical mobile range) and that red is positive and black is negative as labeled for the IC-880H.
You should see: Voltage is stable and polarity is correct, or you find low/noisy voltage or reversed leads.
Try a known-good power source
Connect the radio to a known-good 13.8 V power supply or battery with adequate current capacity using short, proper-gauge leads. Avoid weak cigarette-lighter adapters for this test.
You should see: The radio stays on, or the same flash-and-click failure repeats on a good supply.
Power on with minimal accessories
Disconnect optional accessories (external speaker mic extras, data cables) and try powering on again with only DC power connected. Note whether the click still happens immediately.
You should see: The radio either stays on, or the symptom is unchanged with accessories removed.
Stop for service if it still trips
If a verified good supply still produces a brief display, loud click, and shutdown, treat it as an internal fault. Contact Icom service or a qualified two-way radio technician rather than opening the radio yourself if you are not trained.
You should see: You have ruled out external power issues and have a clear handoff for repair.
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Extra tips
What to look for: Display lighting for a fraction of a second, a loud relay-like click, immediate shutdown, and whether any other 12 V gear works on the same supply.
Before you change anything: Confirm the radio model is Icom IC-880H (or IC-880H). Note whether you use a vehicle battery, power supply, or cigarette-plug adapter. Do not reverse DC polarity. Disconnect the antenna only if you need safer access to the power connector—otherwise leave RF cables alone unless inspecting them. If you smell burning or see damaged wiring, stop and use a qualified tech.