3 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
Motherboard failure — laptop stopped suddenly and will not power on (UM325UA)
A repair-forum user reports their UM325UA-KG501TS stopped suddenly while in use and will not power on, with no LED when the charger is plugged in. The user suspects a short circuit on the motherboard. This is a single owner report on a repair forum, so it is anecdotal but points to a possible sudden-death failure mode.
What to check. If the machine dies suddenly with no power LED, this may be a motherboard-level failure requiring board repair or replacement; check warranty coverage before paying for out-of-warranty repair.
Brightness bug after screen lock — firmware bug suspected on UM325SA
A German owner of a UM325SA reports that after locking the screen, the display reports maximum brightness but is visibly dimmer; lowering brightness by one step makes it brighter again. A forum respondent calls it a suspected Asus firmware bug.
What to check. If you see this, try updating firmware/drivers first; if it persists, it is a known firmware-level quirk, not a hardware failure — but verify with Asus support before assuming it will be fixed.
TechSpot's review aggregation lists OLED flickering at low brightness as a reviewer complaint for the UM325S. This is a secondary/aggregated source, lower weight than owner forums, but it corroborates a display-level quirk.
What to check. If you are sensitive to flicker, keep brightness above the low end or check for driver updates; this is a known OLED characteristic rather than a defect unique to this unit.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Laptops catalog, version 0.1.1, under the CC-BY-SA-4.0 license.
