[Help] F5-221 will not boot

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endian675
Posts: 2
Joined: 04 Apr 2026, 22:54
Great Britain

[Help] F5-221 will not boot

Post 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?
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TMzethar
TM Support
Posts: 2815
Joined: 27 Oct 2020, 16:43

Re: [Help] F5-221 will not boot

Post 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
To contact our team, please send email to following addresses, remember to replace (at) with @:
Technical team: support(at)terra-master.com (for technical support)
Service team: service(at)terra-master.com (for purchasing, return, replacement, RMA service)
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endian675
Posts: 2
Joined: 04 Apr 2026, 22:54
Great Britain

Re: [Help] F5-221 will not boot

Post 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.
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