Logitech Wireless Touch Keyboard k400 Repair

The Logitech K400 (marketed as K400 Plus on Logitech’s site) is a compact wireless keyboard with an integrated multi-touch trackpad designed for living-room PC and smart TV control. It features quiet, low-profile keys, dedicated media keys, and a large touchpad for cursor control without a separate mouse. Built with durable materials and a spill‑resistant design, the keyboard also uses recycled plastic in its construction and offers up to 18 months of battery life. An on/off switch and power‑saving technology help extend battery life for casual home and HTPC use.

The Logitech Wireless Touch Keyboard k400 includes Keyboard (M/N Y-R0055) and USB receiver (M/N C-U0008). Model labels are located as follows — Keyboard: on the underside product label; USB Receiver: printed on the flat face or side of the receiver housing near the USB plug. Each component carries its own model (M/N) and serial (S/N) identifiers.

• Model / SKU: K400 Plus / 920-007119 (MPN 920-007119)
• Form Factor: Compact full-width keyboard with integrated multi-touch trackpad (designed for living-room/HTPC use)
• Key switch type: Quiet membrane / scissor-style key mechanism (manufacturer not disclosed; proprietary Logitech design)
• Connectivity: 2.4 GHz wireless via Logitech nano USB receiver (single‑button pairing) — USB receiver model not specified on product page
• Battery: 2 × AAA (user-replaceable); on/off switch and power-saving tech
• Battery life: Up to 18 months (typical use, per Logitech product page)
• Touchpad: Built-in multi-touch touchpad (large surface, supports basic gesture navigation)
• Materials and durability: Spill-resistant design; constructed using recycled plastics and durable key caps (Logitech sustainability notes)
• Compatibility: Windows and Android (media and hotkeys designed for PC/TV-connected PCs and Android devices)
• Special features: Dedicated media keys, quiet keys, large built-in touchpad, onboard power switch, compact living-room layout

Common faults include unresponsive keys or touchpad (often caused by depleted batteries, debris, or liquid ingress) and wireless connectivity problems (lost pairing or faulty receiver). Diagnose by verifying fresh batteries and the power switch, reseating or re-pairing the nano receiver on another USB port/PC, inspecting the battery compartment for corrosion, and testing the touchpad and keys on a different system.

For additional troubleshooting help, visit: Visit https://support.logi.com for drivers, FAQ, and contact options.

Limited hardware warranty (region-dependent; check support.logi.com for specific terms).

• https://www.logitech.com/en-us/shop/p/k4...