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[Help] F5-221 will not boot
Posted: 04 Apr 2026, 22:56
by endian675
I have a new-to-me F5-221. When I switch it on, I get no boot, no output from HDMI, and all of the drive lights are permanently on (not flashing) and the LAN light is not lit. There are no drives installed, and the TNAS PC For Windows app cannot find the NAS on the network. Please can someone help me determine what's wrong?
Re: [Help] F5-221 will not boot
Posted: 05 Apr 2026, 10:19
by TMzethar
This model has been discontinued for several years. Based on your description, there may be a hardware issue.
We recommend that you refer to this troubleshooting guide and follow the steps to diagnose the problem:
viewtopic.php?t=4837
Re: [Help] F5-221 will not boot
Posted: 10 Apr 2026, 18:44
by endian675
The cause was an incompatible RAM module, supplied to me by the previous owner. I removed the RAM module and the device booted without issue.