Bench Notes

A plain sheet for the four survivors on this bench. For each one: what it runs, and one test you can run yourself. No special tools, no bench required. If a test disagrees with me, trust the test.

1. Note 3 — 2013 (SM-N900, codename ha3g)

What it runs: an unofficial LineageOS 22.2 (Android 15) community port. Official LineageOS stopped this chip at Android 7.1, so somebody outside Samsung keeps it alive.

Where its clock actually is: the battery, not the ROM.

Test (cell, no root): charge to 100%, turn on airplane mode, lock the screen, leave it one hour. Check the number. A few percent is normal. A double-digit fall at idle means the cell is your limit, not the software. The cells still sell new, so this is a part you replace, not a death sentence.

2. Xperia Z5 Compact — 2015 (E5803, suzuran)

What it runs: two builds. LineageOS 23 (Android 16) and an older Nougat. The daily spot goes to the older one by choice, not because 16 failed.

Where its clock actually is: nothing broke. Preferring a build is not a fault.

Test (camera dead?): open the camera app on both builds. Fails the same way on both, it is the hardware. Works on one, it is software.

3. The survivor — Samsung NP300E5A, 2011

What it runs: still unconfirmed. What I have seen: alive with hinge and keyboard damage, so it survived being opened. That itself breaks the pattern of the machines that did not.

Where its clock actually is: the display cable, worn worse by a hinge that creases it at the same fold every close. The cable is the symptom; the hinge is the cause.

Test (dark, flickering, or blank screen): watch the screen while you slowly open and close the lid. – Flicker or blanking that tracks the lid –> the cable through the hinge. – Static lines that ignore the lid –> the panel itself. – Image only visible when a flashlight hits it at an angle –> backlight or fuse.

4. Oldest — LG X130 netbook, 2009

What it runs: a 32-bit x86 Linux, if anything. The Atom N270 is 32-bit only; it cannot run a modern 64-bit build.

Where its clock actually is: not the hardware. The Linux world stopped shipping 32-bit x86. Ubuntu dropped i386 years ago, and Debian dropped it with Trixie.

Test (is your OS still shipping?): open a terminal and run uname -m. If it says i686 or i386, and your distro no longer publishes updates for that architecture, then the operating system is the countdown, not the netbook.

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Four machines, four countdowns, none of them sitting where the symptom points. That is the whole lesson: find the part with a limit, not the part that is complaining.

If any read here is wrong for your machine, say so and I will correct it. The test wins over me.