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Lenovo R61 shows FAN ERROR and 2 beeps, but boots after ESC—Is CPU cooling failing?

bossman1974 55306 45
Best answers

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]
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  • #31 13075597
    kucharz_86
    Level 12  
    Hello.
    I have a problem with the fan in the lenovo g770 lap, namely I have cleaned the cooling system prophylactically, etc. I put everything as it should be and the fan started to tickle me, I wanted to lubricate it, but unfortunately I have a problem with taking it apart, please help, I put pictures of the fan.
    Regards.

    https://obrazki.elektroda.pl/8985361200_1387395375.jpg
    https://obrazki.elektroda.pl/1016183300_1387395380.jpg
    https://obrazki.elektroda.pl/7406182100_1387395384.jpg
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  • #32 13075890
    adamadi33
    Level 43  
    You probably damaged it, replacing the fan in your case.
  • #33 13076185
    kucharz_86
    Level 12  
    Probably not because normally it works, it just spins like that. And anyway, as if I could damage it as soon as I cleaned its dust from its blades.
  • #34 13079663
    dr.master
    Level 39  
    kucharz_86 wrote:
    Probably not because normally it works, it just spins like that. And anyway, as if I could damage it as soon as I cleaned its dust from its blades.

    By doing so, you have unskillfully destroyed the fan. It's only eligible for replacement now, I've been through this before.
  • #35 13079806
    kucharz_86
    Level 12  
    I have already cleaned such fans is my first time and the best thing happened to me in my case :D , nom but nothing I have struggled with him for a long time today and I made him for as long as it remains to be seen :) I will be looking for a spare just in case.
    So thanks so much for the information everyone.
    Regards.
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  • #36 14029898
    Domingo1
    Level 11  
    Hello, I have to warm up the topic.
    The old fan started to die, so I decided to buy a new one. I replaced it and it turns out that the laptop does not start, I connect the old one is ok. I replace the new one with a new one and the problem repeats. I read that I should do a bios restart. Will any of the honorable forum members tell you how to do it?
  • #37 14030120
    kucharz_86
    Level 12  
    The easiest way is to pull out the bios battery for several dozen seconds, but I do not know if it will do anything
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  • #38 14108960
    Noochybanie
    Level 2  
    I have this problem with the T61:

    The fan worked as it wanted, turned on once and not once. When he turned on, he was walking loudly, rubbing. I replaced it with a new one, the problem repeats, but when it turns on, it works normally. At startup, it turns on for a second, then nothing for 2 minutes, and then it turns on by itself, or when I blow it (with the computer open and turned on). Can this be set in the BIOS?

    EDIT:

    There are no options in BIOS, speedfan doesn't detect any fan either. What can you do with it?

    EDIT2:

    After several days of observation, you can see that when the computer starts to heat up and goes to high temperature, the fan starts up until it drops to a safe temperature. Can it be set to either walk all the time or try to keep to a specific temperature? I don't know where to find such settings.
  • #39 14769848
    Gelip
    Level 35  
    Noochybanie wrote:
    I have this problem with the T61:
    Can it be set to either walk all the time or try to keep to a specific temperature? I don't know where to find such settings.

    Of course it is possible, e.g. with TPFanControl v 0.63. You set the temperature at which the fan should turn on in the .ini file or you set the manual mode :-)
    tpfc_v063.zip
  • #40 18427702
    pielegniarka
    Level 9  
    For me, the topic is still up-to-date, the fan has already been replaced twice in this model, half a year of calm and the symptoms are back - FAN Error. The laptop has successfully upgraded to the T9300 prock and 4GB of the frame and the performance is sufficient for my use in this configuration. Someone has information where to buy a proven fan replacement for the Lenovo R61i TYPE 7650-E6G model or, as a last resort, the original.
  • #41 18429259
    Gelip
    Level 35  
    pielegniarka wrote:
    half a year of calm and the symptoms are coming back - FAN

    Half a year is not enough. Do how appears Fan Error and when you press Esc does the computer boot up and run?
  • #42 18431898
    pielegniarka
    Level 9  
    Yes, the laptop works when you press ESC and when you put your hand you can feel that the fan is blowing but it is annoying because I like it when everything works perfectly.
  • #43 18432252
    Gelip
    Level 35  
    Fan Error occurs when the cooling check system does not detect the fan speed, i.e. the fan cannot start up.
    These exchanged are probably some cheap replacements? I once bought a replacement and it turned out that the blades were touching the bottom of the fan housing, it could not start and Fan Error appeared. I do not know where to buy a good replacement or the original, but that would probably solve the case.
    Somehow I do not believe that something in the checking circuit could break down just like that, e.g. a resistor or something, unless from a lightning strike, as someone wrote in this topic:
    bl4ky wrote:
    there is just a FAN Error in the upper left corner. Apparently the house in which it was used was hit by lightning or lightning struck somewhere next to the house.
  • #44 18432333
    pielegniarka
    Level 9  
    I bet that these are poor quality replacement - I don't remember, but the fan itself cost me about PLN 25-30 with the shipment. There is no point in returning to the website because it is a skin for a layette. It's a pity because the 3 paws were upped with the same prock and frame and everything is just the flawed one.
  • #45 19397499
    daranlll
    Level 1  
    I have the same problem, but I have never touched the fans in my life.
    do i have to go to the site or what? when I wrote to them, they wrote to me that they don't hear any problems.
    what is it caused by?
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  • #46 19415541
    pielegniarka
    Level 9  
    For me, the fan has already been replaced with a noname, so far the laptop works quietly. Unfortunately, windows 10 is a memory-eating trash and only after turning off a lot of junk running in the background, it works somehow. The 7ka was much faster before. Laptop redrawn: 2.5 GHz T9300, 4Gb, disk returned to the disk because the Adata SU800 SSD crap broke after 3 months and further investments have already discouraged me. Future prospects - some light Linux - because generally these laptops, apart from the fan, are armored.

Topic summary

✨ 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.
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FAQ

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].

How do I clean and re-oil the original fan?

  1. Remove seven heat-pipe screws and lift out the module [Elektroda, remi080, post #8685396]
  2. Pull the impeller off its magnet, blow out dust, then add one drop of light machine oil to the sleeve.
  3. 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].

How can I bench-test the fan before fitting it?

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.
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