- Short answer
- On a Tap & Chip, one red light is low battery and the first and fourth flashing mean tampered; blue lights mark pairing and payment.
- Tampered reader
- First and fourth lights flash red; tampering, a severe drop or unstable power can cause it.
- Firmware update
- A required update can make the reader unavailable for up to 10 minutes and needs at least 50% battery.
- Not decoded
- Other red patterns and lights during updates — none on the Tap & Chip pages we read, October 9, 2026.
What do two blinking red lights mean?
If the first and fourth lights flash — Shopify's "two flashing red lights" case — the reader is tampered and can no longer be used. Its security page describes that tampered state as red LEDs on both the left and right.
Tampering, a severe drop or an unstable power source can cause it, and the reader needs to be replaced: request a replacement. A single red light is Shopify's low-battery signal; the pages we read decode no other red pattern (note below).
What do the battery, blue and flashing lights mean?
The other documented patterns are routine:
| What you see | What it means | What to do |
|---|---|---|
| 1–4 lights after pressing power | 25%, 50%, 75% or full charge | Keep at least 50% for updates and above 50% for pairing |
| One red light | Low battery | Charge it; full takes 1–2 hours |
| First light on, second flashing | Charging | Nothing |
| Lights flash every 5 seconds | Rest mode after 30 seconds idle | Nothing; it stays connected |
| All four flash back and forth in blue | Ready to pair (4-second button hold) | Release the button, or it turns off |
| Four blue lights during a tap | Contactless payment notification | Hold the card or device until all four show |
| Status lights blink 4 times | Paperclip reset in the pinhole | Nothing |
Source: Shopify Help Center, read October 9, 2026.
What if the lights match none of these?
A required firmware update can make the reader unavailable for up to 10 minutes, an optional one for up to 2 minutes, and it needs at least 50% battery to apply. Still won't pair or connect? Work through the pairing fixes.
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