[HOW TO] Recover no beep / dead Intel based Qnap x53/x51 (2014~2016?)

[dolbyman]

if you have no lpc bus header check the fintek superio

[mcbrite]

My voltage from pin 1 to 8 or 10 is 2.44V can anybody tell me what Ohm (and W) resistor I would need for that and how that is calculated? Thank you!

[spile]

My voltage from pin 1 to 8 or 10 is 2.44V can anybody tell me what Ohm (and W) resistor I would need for that and how that is calculated? Thank you!

Wattage is immaterial. Smaller the better so it takes up less room. Resistance seems to be trial and error with most people going for 100 Ohm.

[mcbrite]

My voltage from pin 1 to 8 or 10 is 2.44V can anybody tell me what Ohm (and W) resistor I would need for that and how that is calculated? Thank you!

Wattage is immaterial. Smaller the better so it takes up less room. Resistance seems to be trial and error with most people going for 100 Ohm.

How is that possible? You have a current V and a V you're trying to reach (that's "in spec"), why couldn't you calculate the perfect resistance for the individual case?
I just don't know enough about electronics to do that, but I don't see how it would be trial and error?

[spile]

My voltage from pin 1 to 8 or 10 is 2.44V can anybody tell me what Ohm (and W) resistor I would need for that and how that is calculated? Thank you!

Wattage is immaterial. Smaller the better so it takes up less room. Resistance seems to be trial and error with most people going for 100 Ohm.

How is that possible? You have a current V and a V you're trying to reach (that's "in spec"), why couldn't you calculate the perfect resistance for the individual case?
I just don't know enough about electronics to do that, but I don't see how it would be trial and error?

Tolerance. In terms of power of the resistor due to minuscule current it’s immaterial. In terms of the resistance needed, the OP stated 100 ohm but as others have said slightly higher or lower works for them. Besides if you measure the resistance with a multimeter you’ll find it’s most likely not going to be exactly as stated anyway, especially if it not a gold tolerance.

[dolbyman]

On top a multimeter will be too slow to show the digital signal voltage anyways..you'd need a scope for that

[mcbrite]

On top a multimeter will be too slow to show the digital signal voltage anyways..you'd need a scope for that

Fair enough... But say I had a scope, the question remains the same: How do I calculate the ideal resistor?

[dolbyman]

See here for pointers

https://www.youtube.com/watch?v=Y8_emfoR_MI

[hipopo911]

Hello,
I would like to thank you for useful information from this thread that allowed me to FIX my QNAP TS-251 affected by the Intel CPU bug.
Symptoms:
- NAS was no longer responding to web, ssh, ...
- Fan was runing at full speed
- After force reboot all led were on
- Voltage between pin 1 and 8 was 2.4V
Correction:
- I soldered a 100 ohms resistor on two connectors, and plug-in them between 1 and 8
Result:
- My QNAP TS-251 is now up and running

Thank you again for information you provided and that permitted me to fix my broken NAS.