Logitech HARMONY 350 Repair

The Logitech Harmony 350 is a handheld universal infrared remote control designed to replace multiple entertainment remotes with a single durable unit. It is constructed from durable ABS plastic with silicone rubber buttons to withstand frequent use. Key features include infrared-only control, support for up to 8 devices via a large device code database, and pre-programmed device profiles for common TVs, set-top boxes, and media players. Logitech’s online device database historically provided setup and device codes, though some legacy configuration tools are no longer maintained.

The Logitech HARMONY 350 can be identified by the model number (M/N N-I0004). The model label is on the underside under the battery cover; any accessory (none standard) would be labeled on its housing. This label lists the model (M/N), part (P/N), and serial (S/N) numbers.

• Manufacturer: Logitech
• Model: Harmony 350
• Form Factor: Handheld infrared universal remote
• Connectivity: Infrared (IR) only — no RF or Bluetooth
• Supported Devices: Controls up to 8 devices (TV, set-top box, DVD/Blu-ray player, receivers, media players, etc.)
• Buttons / Key Switches: Silicone rubber dome buttons (manufacturer not specified)
• Power: 2 × AA batteries (user-replaceable)
• Materials: Durable ABS plastic housing with silicone rubber button membrane
• IR Emitter: Standard IR LED emitter (manufacturer/model not specified)
• Configuration: Pre-programmed device profiles from Logitech’s device database (legacy configuration tools and some software are no longer maintained)
• On-device Label Locations: Model/serial label: underside beneath battery compartment; device name printed on front face

Common faults include unresponsive or sticky buttons (wear or contamination), dead IR emitter, and corroded battery contacts. Diagnose by swapping fresh batteries, verifying IR output with a phone camera, removing the battery cover to inspect contacts and button membrane, and opening the case to check/clean or re-seat the silicone membrane and IR LED solder joints.

For additional troubleshooting help, visit: Visit https://support.logi.com for articles, contact options, and device support information.

Refer to Logitech’s warranty page for region-specific warranty terms; warranty length and coverage vary by region.

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