- Laptops
- Laptop
Working on Memory Training
ASUS Working on Memory Training on laptop: wait, do not power off
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
After a BIOS update, a memory change, disconnecting the battery or an EC or RTC reset, an ASUS laptop runs memory training on the next boot. Connect the charger, avoid a forced shutdown and wait about 5 to 10 minutes.
Safety first
Stop and check this first
- Do not force a shutdown during memory training or a BIOS recovery: ASUS asks you to keep power connected and wait.
Safe checks you can perform
- Recall what changed before this boot
- Wait with the charger connected
- Tell a steady light from a flashing battery light
- EC and RTC reset if nothing changes
Leave these tasks to a qualified professional
- Do not attempt this professional task: ASUS service check if training never ends
- Do not attempt this professional task: Technician check of the installed memory
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
ASUS service check if training never ends
What they doIf after several full waits and an EC reset the laptop still has no picture, the service center examines the boot process with its own tools.
They must show youthe laptop with no picture after the wait and then reaching the system normally.
In writingthe earlier operations (BIOS, memory, battery), the cause found, what was repaired and the warranty.
Technician check of the installed memory
What they doIf the problem began after adding or swapping memory, the technician confirms compatibility or returns the device to its factory configuration.
They must show youwhich memory is installed and the memory test passing.
In writingthe memory removed or fitted, whether it is compatible with your model and the test result.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Recall what changed before this boot
- Who:
- you, before touching the power button.
- How:
- think whether you just updated the BIOS, swapped or added memory, disconnected the battery, or ran an EC Reset or RTC clear, which are the operations ASUS links to memory training.
- Result that matters:
- knowing whether the black screen is the normal wait ASUS describes.
- If you did one of them:
- move on to waiting with the charger connected.
- If you did none:
- go through the general boot failure steps on the same ASUS page.
- Evidence to keep:
- which operation you did, when, and the BIOS version if you updated it.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
Wait with the charger connected
- Who:
- you, without touching the keyboard or button.
- How:
- connect the original adapter, leave the laptop on a table and wait at least 10 minutes, the upper guide time ASUS gives for 64 GB of memory. Do not hold the power button to force it off.
- Result that matters:
- the device finishing training and loading the operating system by itself.
- If it reaches Windows:
- nothing else is needed; the next boot will be normal.
- If it is still black after that time:
- check the indicators in the next step.
- Evidence to keep:
- when the wait started and ended and which lights were on.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
Tell a steady light from a flashing battery light
- Who:
- you, watching the laptop indicators.
- How:
- check whether the power indicator is steady or the battery charge indicator is flashing. ASUS explains that on notebooks a flashing charge light with a black screen means the BIOS ROM is preparing a recovery and that its progress window can take about 5 to 8 minutes to appear.
- Result that matters:
- knowing whether this is memory training or a BIOS recovery you must not interrupt.
- If the recovery window appears:
- keep the charger in, because ASUS estimates about 2.5 to 3.5 hours.
- If there is no light at all:
- this is a power problem; follow the no indicator section of the ASUS guide.
- Evidence to keep:
- a short video of the lights and of whatever appears on screen.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
EC and RTC reset if nothing changes
- Who:
- you, without opening the device.
- How:
- remove external devices, turn the laptop off, connect the adapter and press and hold the power button for 40 seconds. On 20 second models, ASUS says the indicator flashes rapidly for about 3 to 5 seconds after 15 seconds; release when it stops. Then power on. Remember that the device trains its memory again after this reset.
- Result that matters:
- the laptop booting after another training wait.
- If it boots:
- note the date in case the problem comes back.
- If there is still no picture after another full wait:
- contact ASUS service.
- Evidence to keep:
- how many times you repeated the reset and how long you waited after each.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen) · How to Reset Embedded Controller (EC Reset), Real-Time Clock (RTC), and Hard Reset
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Laptops
- Brand
- ASUS
- Product type
- Laptop
Known code variants
- ASUS black screen after BIOS update
- ASUS no display after memory upgrade
- ASUS pantalla negra tras actualizar BIOS
- entrenamiento de memoria
- memory training
- memory training black screen
- pantalla negra tras cambiar memoria
- Trabajando en el entrenamiento de memoria
- working on memory training ASUS
What it means
ASUS's page on boot failure and black screen after boot (Notebook, All-in-One PC, Gaming Handheld, Desktop and MiniPC) explains that after those operations the device performs a complete memory training and shows nothing meanwhile, with the power indicator lit. It takes about 5 to 10 minutes depending on memory size. The Working on Memory Training text only appears on Intel Lunar Lake or newer platforms with a screen below 2880x1800 and 120 Hz; other devices simply stay black. Other models may differ, and the message alone never proves that a part is faulty.
Warnings and stop conditions
- Mediumsource verified
Do not force a shutdown during memory training or a BIOS recovery: ASUS asks you to keep power connected and wait.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
Symptoms and causes
Probable causes · in order
- Recent BIOS updateCommon
ASUS lists a BIOS update among the operations after which the next boot needs a complete memory training.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
- Memory modules changed or battery disconnectedCommon
Replacing memory with a different capacity or brand, or disconnecting the battery (CMOS battery included), also triggers training again according to ASUS.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
- Embedded controller or RTC resetPossible
An EC Reset or RTC clear returns the hardware to its default state, and ASUS says the device trains its memory again afterwards.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen) · How to Reset Embedded Controller (EC Reset), Real-Time Clock (RTC), and Hard Reset
- Boot that never finishes for another reasonLess common
If the wait runs far longer than stated, ASUS points to its general boot failure steps and, in the end, to its service team.
Evidence: Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
Virtual technician
Does Working on Memory Training still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Troubleshooting - Device Boot Failure or No Display After Boot (Black Screen)
ASUS · 2026 · official_doc
- 2
- 3
How to Reset Embedded Controller (EC Reset), Real-Time Clock (RTC), and Hard Reset
ASUS · 2026 · official_doc
- 4
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