A1708 820-00840-A 5V 400ma

[briancomputerdoctor]

Ah, okay. I tested the R7847 that I extracted and it gives 4.5K

I will extract the other.

 

[briancomputerdoctor]

The pdf says that R7847 should be 4.7K but I can't see what R7807 should be.

 

[2informaticos]

R7807 must be 0 ohm.

 

[briancomputerdoctor]

I extracted it and it's reading as 0

 

[2informaticos]

Check S5_PWRGD and PM_EN_P3V3S5G.

 

[briancomputerdoctor]

S5_PWRGD 3.24v 0.435
PM_EN_P3V3S5G 0v 0.432

 

[2informaticos]

Check R7884.
If good, change U7800.
You may try to change U8205 first; just in case, it may kill the enable signal.

 

[briancomputerdoctor]

R7884 is good, gives 0 ohms.

When I remove U8205 from the donor board, is there a way to test that it is good before installing?

 

[2informaticos]

Check if PM_EN_P3V3S5G goes high then.

 

[briancomputerdoctor]

Check if PM_EN_P3V3S5G goes high, when? I'm not sure to which part of my comment you're responding.

 

[2informaticos]

"When I remove U8205 from the donor board, is there a way to test that it is good before installing?"
When I don't quote something, the reply is for your previous post.

If enable signal still low after removing U8205, then the chip doesn't cause the problem; so U8205 should be good.

 

[briancomputerdoctor]

When I don't quote something, the reply is for your previous post.

Yes, I understand. But my comment had two parts and I didn't know which you were referring. Thank you for clarifying.

With U8205 there is still no voltage on PM_EN_P3V3S5G

 

[2informaticos]

Try changing U7800...