302. Verify that the RPS is operating correctly.3. Verify that the operating temperature of the switch is in the acceptable range, and the powermodule has good ventilation. Over-temperature can cause the power module to stop workingand enter the protection state.4. If the problem persists, contact H3C Support.Concurrent RPS and AC inputs• If the system status LED is off, the AC power module and the RPS both have an input failure.To resolve the problem:a. Verify that the AC power cord is securely connected to the switch, and the AC-input powerreceptacle on the switch and the connected AC power outlet are in good condition.b. Verify that the AC power source is operating correctly.c. Verify that the switch is securely connected to the RPS.d. Verify that the RPS is operating correctly.e. Verify that the operating temperature of the switch is in the acceptable range, and the powermodule has good ventilation. Over-temperature can cause the power module to stopworking and enter the protection state.f. If the problem persists, contact H3C Support.• If the system status LED is on but the RPS status LED is steady yellow, an AC input failure hasoccurred.To resolve the problem:a. Verify that the AC power cord is securely connected to the switch, and the AC-input powerreceptacle on the switch and the connected AC power outlet are in good condition.b. Verify that the AC power source is operating correctly.c. If the problem persists, contact H3C Support.• If the system status LED is on but the RPS status LED is off, an RPS input failure has occurred.To resolve the problem:a. Verify that the switch is securely connected to the RPS.b. Verify that the RPS is operating correctly.c. If the problem persists, contact H3C Support.Hot-swappable power module failureThe S5130-28F-EI switch uses hot-swappable power modules. You can determine the powermodule operating status by examining the power module LEDs PWR1 and PWR2 on the switch frontpanel. For descriptions about the PWR1 and PWR2 LEDs, see "Appendix C Ports and LEDs."If the LED indicates a power module failure, perform the following steps:1. Verify that the power module model is as required.2. Verify that the power module is installed correctly in the switch.3. Verify that the switch is operating in the acceptable temperature range.4. If the problem persists, contact H3C Support.