I found that one resistor was missing next to the HDMI inter

[gh0st2010]

my raspberry pi 2 MODEL B is not boot~!!!!!
I found that one resistor was missing next to the HDMI interface (R14).
If that's the reason, what's the model number? Thanks

[Burngate]

R14 isn't marked on the cut-down schematics, so we don't know what it does or its value.
It's interesting that, on the pictures I've looked at, it's not fitted on the Pi 3B, though it's there on the Pi 2B and the Pi B+

Are you sure it isn't booting?
Have you tried plugging into an analogue monitor, since Q2 seems to be connected to the CEC pin of the HDMI socket.

[hippy]

It's interesting that, on the pictures I've looked at, it's not fitted on the Pi 3B, though it's there on the Pi 2B

For this Pi2B V1.2, using BCM2837, R14 does not appear to be fitted -

http://raspi.tv/wp-content/uploads/2016 ... 2_1500.jpg

But it does appear to be fitted for this Pi2B V1.1 using BCM2836 -

https://tr1.cbsistatic.com/hub/i/2015/0 ... -pi2-1.jpg

[Burngate]

It seems unlikely (though not impossible) that changing the SoC meant that resistor wasn't required.
Perhaps Q2 has been changed for a different type?

[gregeric]

I'd hazard a guess that R14 is the same pullup resistor as R15 on the CMIO boards, on the HDMI_CEC line. There it is a 27K pullup to 3V3 on the CMIO Rev 1.2, but not fitted on the CMIO Rev 3.0.

[Burngate]

So it is possible that the newer SoC has a built-in pull-up, negating the need for R14/15

CEC2.png

[gregeric]

Nah, the CMIO3 works with the CM1. Maybe they use an internal pullup, or it just isn't needed, WJDK.