Dell PowerVault TL4000 - Manual (Page 189)

4. Remove cartridge. If cartridge was reported as Bad, properly dispose the
cartridge.
5. Close the I/O Station. If the amber LED was lit because of bad media, the
Attention
LED will turn OFF. If the amber LED is still on, check the power
supply or the power supply fans. See “Isolating a Power Supply Problem” on
page 7-7.
Chapter 7. Troubleshooting 7-13