Laptop Keyboard: input controller failure. The local controller stops scanning or reporting the device.

The distinguishing clue

The entire device is absent while its cable and power are intact.

Checks before an assessment

Record the exact affected keys, layout and whether the problem happens in every application. An external keyboard can help keep work accessible without pressing damaged keys harder.

Stop point: Liquid residue under a keyboard can continue corroding the motherboard.

Workshop confirmation and repair

Device-level check: Test in firmware and Windows, inspect layout settings and check the ribbon without forcing its latch.

Targeted check: Compare firmware detection and test controller power and communication. If confirmed: Replace the module or repair the board controller path.

Repair boundary: Replace the matched keyboard or repair its connector after software causes are excluded.

Related cause to rule out

When the device is not detected and shows no response in any environment, also consider Laptop Keyboard: input-device power loss before choosing a repair.

Checks after the work

After repair or replacement, check every key, modifiers, backlight, sleep shortcut and repeated typing.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.