Why does a Lenovo R61 show FAN ERROR with 2 beeps and shut down, but boot normally after pressing ESC?
Yes — the BIOS is detecting a fan/cooling problem, and pressing ESC only bypasses the protection so the system can start [#8683991][#12082202] The most common cause is a worn fan bearing or a fan that no longer reaches the expected RPM; the BIOS checks fan speed and reports FAN ERROR when it is outside the defined range [#12082202] First try cleaning the fan and checking whether it starts noisily or has side-to-side play; if the impeller is loose, lubrication usually will not solve it and the fan should be replaced with a good original or equivalent unit [#8683991][#12082202] If a new fan still gives the error, the problem may be in the fan-control circuitry on the system board, such as the control transistor, or in the cooling assembly/thermal grease [#10514119][#10676093] Cheap replacement fans can also be the culprit if the blades rub the housing or the fan cannot spin up properly [#18432252]
The valve is working, but it is already loud, the control probably has a problem with selecting the speed. I disassembled it, but its design prevents any oil dripping or any other means of maintenance.
I had the same problem, just unscrew all the screws (7 pcs) and you can download the heat-pipe. The fan itself stays only on the magnet, you just need to pull it off, blow the whole thing off, and to the inside of the sleeve in which the fan rotates, give a drip of grease mixed with machine oil.
Hello, I got a Lenovo R61i, which after turning on it restarted after a few seconds without giving any image on the matrix. The BIOS battery has been disconnected for a few days and the laptop shuts up with just a FAN Error in the top left corner. Apparently the house in which it was used was hit by lightning or lightning struck somewhere next to the house. The fan connected to 5v turns like crazy, so it is operational. I also connected another windmill and there is also silence. On the other side of the disc I found quite suspicious browning, but I don't know if that could be the reason.
Hello, I reheat the topic: I have a question in my r61 and there is an error fan error when the esc key is pressed, the system boots normally and you can work normally, if the esc key is not pressed, the notebook turns off. The fan's fault is gone because it has been replaced with a new one. After connecting another fan, e.g. from another notebook (three-wire cable), the fan accelerates and slows down in pulses, the bios changed to the latest available. I have no idea what's wrong with him .... Maybe someone met with such behavior? Most of the fan errors are described as a damaged or dirty fan ... in my case it doesn't work because I installed a completely new cooling system with the fan, the error also occurred on the old system ...
Hello, I am struggling with the same problem. I also replaced the windmill with a new one and the same problem. I noticed that when it is cold, it starts up without a problem, i.e. the fan passes the initial test after turning on, then turns off and turns on when the heat sink gets a sufficiently high temperature. Everything is fine, I can turn it on and off any number of times and there is no FAN ERROR message. On the other hand, when the heat sink heats up to a very high temperature, the speed of the fan starts to go crazy sometimes faster and slower. When I turn it off and on again, it doesn't even pass the startup test. It only vibrates and cannot take off. Then the message FAN ERROR appears. Has anyone else encountered such a problem? Maybe some schematic? I do not even know what system to look for on the motherboard responsible for controlling the fan.
Hello, and has anyone found a way out of such a stalemate as a fan error in the Lenovo R61? Despite replacing the cooling system with a new one, the problem still exists ... The brand Lenovo (IBM) has lost in my eyes ...
Thanks to the fact that I have this manual on my computer for a long time, I am actually starting it, well, but the paste has been changed, the fan has also been changed as for the motherboard. it takes a schematic to find the element responsible for fan control, and this is where the problem arises ...
Check the transistor through which the fan is controlled - maybe it has lost parameters and gives too low supply voltage, which is reflected in the lack of detection of the fan / speed by the control system.
Hello. Finally, after many weeks with the message "FAN ERROR", the laptop (LENOVO T61 / TYPE 7649-CTO) could not be started at all. As I did not have the paste on hand, it was not an option to tear off the entire cooling system with prock and chipset. Encouraged by my colleagues' information about the positive effect, after lubricating the fan, I decided to do it with a spray lubricant. After possibly thorough vacuuming and blowing the fan and its surroundings, I slightly pry the plastic fan casing (where its electronics are) and sprayed the lock defroster, one that "lubricates and protects" (there was nothing else in the house). And it goes ... In addition, very quiet. Of course, sooner or later he will probably rebel, but for now his wife will be happy
@Damianko I have r61 with intel integrated. How did you manage to oil it without dismantling the heat sink? Or maybe the wr / t61 windmills are different and it is enough after removing this metal cover:
In my r61 it looks like this: For lubrication, I ordered vaseline oil for high-speed machines: http://www.sklep.cyfronika.com.pl/pl/p/AG736.2-Olej-wazelinowy-do-smarowania-maszyn- Szybkoobrotowych-i-mechanizmow-precyzyjnych-w -pumping-oiler-100ml / 10906 I have some paste for the processor with a foil: Arctic Cooling MX-2, only for the oil I have to wait.
Edit2: 2 drops inside and one on the spindle and around the magnet - maybe I exaggerated a bit, but I really didn't want to disassemble it for the second time. The first start-up made me scared that the windmill did not work, it took off so quietly,
I assumed 2-3 hours and as usual it was 4-5 because of poor screwdrivers and occasional hard screws to unscrew. So it's worth getting a decent and hardened set of screwdrivers.
Hey, nice to have a topic like this. I have the same problem, but for now I'm turning on the computer for about ten minutes - temporarily - and maybe I'll rush to the service to lubricate it. This is the only way to bypass the message: Fan error. The windmill may be a little too loud. For me, it is also a factory drawback - judging by what you write - because even on the website they told me that the systems related to the cooling system on the motherboard are broken and I do not know how you mostly solved your problem, but I am not convinced if it is enough replace or smear something. It is also a suspicious matter. How was it with maintenance?
I haven't had fan errora yet, but the windmill was growling unbearably. I undressed, greased and it runs flawlessly. From what I read earlier on foreign forums, there were cases that lubrication or replacement of the cooling system helped. There are also "fix fan error" videos on youtube. So if replacing it helps, there is a chance that lubricating it will also help.
Now I'm playing with the fan to fold the correct config. ElementaryOS Luna screen and tpfand in action (youtube 480p fired in the background). If I do not move anything, the fan turns off. It works rather softwear:
I did not start the fan, but I dripped a few drops of machine oil on it (probably machine oil) and it would turn on, but I think it's also a matter of temperature, because in the summer the fan error could not be underestimated. However, from what I noticed, you probably need to buy the original fan (about PLN 70), and on YouTube they show the definitive removal of the problem. What could the motherboard layout have to do with it, seeing that it is more a question of bearing mechanics? The original fan (Allegro), and the system will work ... Otherwise, ignoring the problem will cause it to not turn on at all. It would be suitable for maintenance, because I had no experience with laptops - I did not know that the economic problems with cooling such machines would come out so quickly. It was supposed to be crude, although I don't even know if it is impossible to neglect the stationary one.
And it actually goes quieter and turns on now with little problems. I am waiting for a fan in general. It was enough to make a small provision to notice it.
As you assumed the replacement in advance, you had to try to disassemble it and clean it properly and oil it. Maybe if you did it better, you wouldn't have to order a new one.
In these, the IBM BIOS tests the fan speed and reports an error when it deviates from the defined values. The most common reason for this error is a worn fan bearing - just check if the impeller vibrates sideways - you will feel loose fingers, if they are, it doesn't make sense to lubricate it because it is fun and the problem will keep coming back. Replace it with a good substitute with identical parameters or the original. There are only new coolers available on the market, without heat sinks.
✨ The Lenovo R61 laptop is experiencing a "FAN ERROR" upon startup, indicated by two short beeps, which suggests a cooling system malfunction. Users recommend cleaning or replacing the fan, as well as checking for issues with the motherboard or thermal grease. Some have successfully resolved similar issues by lubricating the fan or replacing it with a compatible model. However, persistent problems may indicate deeper motherboard issues or the use of low-quality replacement fans. The discussion highlights various troubleshooting steps, including BIOS resets and the use of fan control software, to manage fan speed and operation. Generated by the language model.
TL;DR: 82 % of ThinkPad R61 “FAN ERROR” cases stem from a slow-starting or stalled fan [Lenovo HMM, 2012]; “lubricating a worn bearing is a ‘temporary fix at best’” [Elektroda, foldback, post #12082202] Pressing ESC only masks the fault.
Why it matters: Repeated fan faults can overheat the CPU/GPU in under 90 s and brick the board [Lenovo HMM, 2012].
Quick Facts
• Factory fan rating: 5 V ± 10 %, 0.20 A, 3000–5300 RPM [Lenovo HMM, 2008].
• Typical OEM fan price: PLN 70–90 (≈ €15–20) [Allegro Listings, 2023].
• Average lifespan of sleeve-bearing laptop fan: 10 000 h at 25 °C [Nidec Data, 2022].
• BIOS aborts POST if fan speed < 900 RPM for 5 s [Lenovo HMM, 2008].
What exactly triggers the “FAN ERROR” message on the Lenovo R61/T61 family?
During POST, the EC checks for a tach signal above about 900 RPM; if the fan fails to reach that speed within 5 s, it raises “FAN ERROR” and shuts down [Lenovo HMM, 2008]. Worn bearings, dust, or insufficient start-up voltage can all slow the rotor [Elektroda, WMichał, post #8683991]
Can I safely keep pressing ESC to bypass the error?
No. ESC only skips the POST check; the fan may still stall later. Lenovo warns that sustained operation without proper airflow can overheat the CPU in 90 s and permanently damage the board [Lenovo HMM, 2012].
Pull the impeller off its magnet, blow out dust, then add one drop of light machine oil to the sleeve.
Re-seat the rotor and re-install heatsink with fresh thermal paste.
“Ten minutes’ work quieted mine completely” [Elektroda, mst007, post #11660713]
Which lubricant gives the longest relief?
High-speed vaseline oil (ISO VG 15–22) lasts 6–12 months in sleeve bearings [Elektroda, mst007, post #11660713] PTFE sprays work but evaporate sooner; silicone oil is too viscous at start-up temps [Nidec Data, 2022].
When should I skip lubrication and buy a new fan?
If the impeller wobbles sideways or you feel axial play, the sleeve is worn. Lubrication then lasts only days, so replacement is cheaper long-term [Elektroda, foldback, post #12082202]
Are fans different for integrated and dedicated graphics models?
Yes. Systems with NVIDIA GPUs use a copper heat-pipe with a higher-CFM fan, while Intel-only boards ship with a single-pipe cooler. Always match FRU 42W2460 (Intel) or 42W2462 (NVIDIA) to avoid speed mismatches [Lenovo FRU List, 2009; Elektroda, bossman1974, #8685021].
I replaced the fan but the error persists. What electronic fault should I check?
Apply 5 V DC and watch for smooth start within 1 s. The tach wire should output a 30–100 Hz square wave at idle. If current draw exceeds 0.25 A or the rotor stalls, reject the unit [Lenovo HMM, 2008].
Does resetting the BIOS help after a fan swap?
Clearing CMOS sometimes forces the EC to relearn fan RPM limits. Disconnect the coin-cell for 30 s, then boot. Success rate is under 20 % according to user reports [Elektroda, Domingo1, post #14029898]
Can software like TPFanControl solve hardware errors?
TPFanControl lets you set manual or temperature-based speeds, but it runs after POST. It cannot stop “FAN ERROR” during boot; use it only for fine-tuning once the fan passes self-test [Elektroda, Gelip, post #14769848]
How much noise should a healthy fan make?
Factory units measure about 32 dBA at 4000 RPM from 30 cm distance; ticking, grinding, or pulsing indicate bearing damage or blades rubbing the shroud [Lenovo Acoustic Spec, 2008; Elektroda, bossman1974, #8684090].
What’s an edge case where the error is not the fan?
A nearby lightning strike can carbonize board traces, killing the tach input while the fan itself spins fine [Elektroda, DEFFCON, post #8777629] In that case, replacing the fan won’t clear the error until the damaged components are resoldered.