Light meaning and fix
Star TSP100IIIW Ready and Error LEDs Blinking Every 2 Seconds
On the Star Micronics TSP100IIIW, the Ready and Error LEDs both blinking at 2 second intervals means a basic board thermistor error.
On the Star Micronics TSP100IIIW, the Ready and Error LEDs both blinking at 2 second intervals means a basic board thermistor error.
What it means
The printer detected an abnormality related to an internal board temperature sensor.
Device details
| Device type | Receipt printer |
|---|---|
| Brand | Star Micronics |
| Model | TSP100IIIW |
| Light name | Ready LED and Error LED |
| Light location | Operation panel |
| Color | Ready/Error LEDs |
| Pattern | Both blinking at 2 second intervals |
| Severity | danger |
| Last verified | 2026-05-02 |
What to do first
Power cycle once. If the same LED pattern returns, contact the seller or service provider.
- Turn the printer off.
- Wait briefly.
- Turn it back on.
- Check whether the same LED pattern returns.
- Avoid repeated power cycling if the error continues.
- Contact the seller or service provider.
When this can be normal
This is not a normal ready state.
When to stop troubleshooting
Stop if the same error pattern returns after power cycling.
Parts or products that may help
Only replace parts when the light pattern and official guidance support it. Some lights indicate setup or software states, not broken hardware.
- No replacement part is recommended from this light pattern alone. Troubleshoot the device state first.
FAQ
What does blinking every two seconds mean?
Star says it is a basic board thermistor error.
Can I fix it by adding paper?
No. This pattern is not a paper-out condition.
Who should I contact?
Contact the seller or service provider if the error returns.
This guide is based on: Star Micronics TSP100IIIW LED Display.
Source type: official_manual. Confidence: verified. Last verified: 2026-05-02.
This is a service-level printer condition, not a normal paper warning.