Lenovo ThinkPad Beep & Error Codes
Updated
ThinkPads show error numbers on screen (0177, 0190, 2100...), beep in patterns, or - on newer models - send a SmartBeep code or blink the charge light amber / white. Consumer models (IdeaPad, Yoga, Legion) mostly use the light colours.
How it works
Count the blinks or beeps, then open the matching table below.
Not sure? The finder above takes the code and gives the meaning.
Covers: ThinkPad, IdeaPad, Yoga, Legion, ThinkBook.
Charge light codes (amber, white) - newer ThinkPads
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The charge light blinks amber, then white; count both. It blinks only for these errors and keeps blinking until the laptop is turned off.
| Code | What it means | What to check |
|---|---|---|
1,2 | Error 0001: reset error (platform reset not released) | Remove the charger, press the emergency-reset hole (or hold power about 7 s), reconnect; else system board. |
1,3 | Error 0002: internal bus error | System board. |
2,2 | Error 0283: PCI resource error | Remove M.2 / PCIe cards and retry; else system board. |
2,3 | Error 0284: TCG function error (BIOS code validation) | System board (BIOS / security). |
2,4 | Error 0285: TCG function error (TPM initialisation) | System board. |
3,1 | Error 0286: integrated graphics error | System board. |
3,3 | Error 0288: display error | Reseat the display cable at both ends; external monitor works = panel, else board. |
SmartBeep error codes (ThinkPads from about 2017)
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The ThinkPad beeps a code; Lenovo's SmartBeep phone app (support.lenovo.com/smartbeep) decodes it. Press Fn to repeat the beep.
| Code | What it means | What to check |
|---|---|---|
0001 | Reset error | Remove all power, emergency reset, wait a minute, reconnect. |
0002 | Internal bus error | Remove all power and reset; else system board. |
0281 | General embedded controller (EC) error | System board / EC. |
0282 | Memory module error | Reseat or replace the RAM; else system board. |
0283 | PCI resource error | Remove M.2 / PCIe cards; else system board. |
0284 | TCG error (BIOS code validation) | System board. |
0285 | TCG error (TPM initialisation) | System board. |
0286 | Integrated graphics error | System board. |
0287 | Discrete graphics error | System board / GPU. |
0288 | Display error | Display cable, panel, then board. |
Error messages on screen (ThinkPad)
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The number appears on a black screen during start.
| Code | What it means | What to check |
|---|---|---|
0177 | Bad supervisor password data (EEPROM checksum) | System board (security EEPROM). |
0182 | Bad CRC2 (setting checksum) | Enter Setup, load defaults (F9) and save; else system board. |
0187 | EEPROM (EAIA) data access error | System board. |
0188 | Invalid RFID serialisation area | System board. |
0189 | Invalid RFID configuration area | System board. |
0190 | Critical low battery | Charge the battery; replace it if it does not hold charge. |
0191 | System security: invalid remote change | Enter Setup and save (F10). |
0199 | Security password retry count exceeded | Wrong supervisor password entered too often. |
0230 | Shadow RAM error | System board. |
0251 | System CMOS checksum bad - defaults used | Coin cell: charge 8 h on AC or replace it; set date and time. |
0271 | Check date and time settings | Set date and time; replace the coin cell if it repeats. |
2100 | Detection error on the main drive (HDD0 / SSD0) | Reseat or replace the drive, then the board. |
210x / 211x | Detection or read error on a drive | Reseat or replace the named drive. |
UEFI variable storage nearly full | The BIOS settings store (NVRAM) is almost full | Press F1 and confirm the clean-up (this deletes data programs stored there). |
Beep patterns (older ThinkPads)
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Listen to the whole pattern and its pauses.
| Code | What it means | What to check |
|---|---|---|
1-3-3-1 | Memory: one short, pause, three short, pause, three short, pause, one short | Reseat or replace the RAM; else system board. |
4 x 4 short | Four series of four short beeps: security chip problem | System board (security chip). |
5 short | System board problem | Board-level repair. |
2 short + error code | A POST error - the code is on screen | Read the code from the table above. |
Light meanings (IdeaPad, Yoga and other consumer models)
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From Lenovo's own (Chinese) knowledge base.
| Light / pattern | What it means | What to check |
|---|---|---|
Charger light blinks once when plugged in | A short circuit inside the laptop | Unplug at once: look for a shorted input / main power rail (board-level). |
Yoga battery light blinks amber fast | Battery fault or bad battery connection | Shut down, unplug, hold power 15 s, reconnect the original charger; check the battery connector. |
Battery light blinks white slowly (Yoga) | Charging between 20 % and 80 % | Normal. |
Power light blinks slowly | Sleep / standby | Normal - press the power button to wake. |
Power light turns on and off again, no picture | Board, LCD / backlight supply short, power supply or power button board | Check for liquid damage and a stuck power button; board-level. |
No light, no beep, no code at all?
- Look at the charger's own light. Off = charger, cable or outlet. If it blinks or goes out the moment you plug it into the laptop, there is a short circuit inside the laptop - unplug it.
- Power reset (EC reset): charger out (and the battery if it comes out), hold the power button 30 seconds, then plug in and try again. Laptops with a built-in battery often have a small reset hole underneath.
- Charge it for 30 minutes with the original charger: a deeply empty battery - or a new laptop in shipping mode - will not start at once.
- Remove what was added last (RAM, SSD, cards) and reseat the RAM.
- Connect an external monitor: a picture there means the laptop's screen, cable or backlight - not the board.
- Still dead: it is a board-level fault - charger chip, a shorted power rail, or the BIOS chip. A repair technician measures the rails in their power-on order.
Step-by-step: the no-power troubleshooter
No beeps on this page for your laptop? Many laptops beep with their BIOS maker's codes - see the BIOS beep codes (AMI, Phoenix, Insyde).
Different code, or still not starting after these checks? Post the code and the laptop model on the NoPowerFix repair forum - board-level technicians answer, and every confirmed fix improves these tables.
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