T410 strange problem

[rippergr]

Re: T410 strange problem

No the fan its brand new.

[atsio]

Re: T410 strange problem

Voltage on pin 32 of U42 from the moment you press power button

[rippergr]

Re: T410 strange problem

I was just ready to write those voltages.
Ok for pin 32 when I press the power button the voltage is 2,5V and the fan is on, it stays like that for 2-3 seconds and then the fan goes off and the voltage goes 3,58V
On pin 33 the voltage is 1,7V fan on and after 2-3 seconds the fan goes off and the voltage is 3,28V
After that the voltage stays at those values and the fan is off

[atsio]

Re: T410 strange problem

Jumper 5v voltage from fuse F4 to pin 1 of J15 and monitor the voltages on pin 3 of J15, and pins 32,33 and 34 of U42

[rippergr]

Re: T410 strange problem

It is very dificult to jumper f4 with pin1 on j15 .I already broke the one end , can I give 5 V with my bench power supply directly to pin 1?

[atsio]

Re: T410 strange problem

Yes, do it.

[rippergr]

Re: T410 strange problem

I have 1,5V in pin 32
1,4V in pin 33
and 0V in pin 34
Fan is always on.
The problem is that it gives me the 1-3-3-1 beep error. Sometimes it starts without touching any connection just leaving it without power for a few hours. When I try it again it starts ok but the fan is not working always.

[rippergr]

Re: T410 strange problem

Today the laptop works like nothing happened.
The fan spins ok and I have in pin 34 0,38V
Pin 32 1,88V
and pin 33 1,43V
Everything seems to working great and I didn't touch anything. I left it two days on my bench and put it on plug today.
If I close it now there is high possibility that it wont turn on again and just give me the 1-3-3-1 beep error ,and all this without toucing anything .

[rippergr]

Re: T410 strange problem

UPDATE:
If I leave the laptop on and use hybernate or sleep everything works fine. If I shutdown and try to reenable it it gives me the 1-3-3-1 error code and the voltages are not correct.
Even if I give 5V to the fan it doesnt boot.
Can I inject voltage to fan control to "trick" it that the fan is ok?

[qonma]

Re: T410 strange problem

we have same problem

[ktmmotocross]

Re: T410 strange problem

fan spin is detected by FAN_FRQ signal. check voltages on R421 and q81 do u have scopeto check fan_freq signal?