Hello , sorry i'm french I'm going to make simple sentences.
hello all
Switch : charge ok , no boot , black screen
without nand , no rcm detected ( plug with usb on laptop good work with other switch )
Switch hac-21
Charge ok , 0.4a / 5V
m92 pin 5-6 = 3.3V , vconn & cc1 ok at 1.5 v ...
Max77620 work, all of 4 power is good , 1.8 , 1v ,1.35v , 1.15v ( BQ &M92 good working)
SOC slow heat (normal)
diode test at 0.4v on usb data line , no short with other pin and all pin is good! usb very clean.
usb data line filter is good.
No short found on motherboard.
I'm not going to try to replace random components and I don't know where to look! and random search is bad (sometimes its working).
What does the soc need to pass in rcm?
we remove the nand, we plug the cable and it's good,
The soc needs its power ok, but does it need ram? does he check components before launching into rcm?
Maybe ram is wrong but i'have black screen not a blue screen..
i search ... have a good day
hello all
Switch : charge ok , no boot , black screen
without nand , no rcm detected ( plug with usb on laptop good work with other switch )
Switch hac-21
Charge ok , 0.4a / 5V
m92 pin 5-6 = 3.3V , vconn & cc1 ok at 1.5 v ...
Max77620 work, all of 4 power is good , 1.8 , 1v ,1.35v , 1.15v ( BQ &M92 good working)
SOC slow heat (normal)
diode test at 0.4v on usb data line , no short with other pin and all pin is good! usb very clean.
usb data line filter is good.
No short found on motherboard.
I'm not going to try to replace random components and I don't know where to look! and random search is bad (sometimes its working).
What does the soc need to pass in rcm?
we remove the nand, we plug the cable and it's good,
The soc needs its power ok, but does it need ram? does he check components before launching into rcm?
Maybe ram is wrong but i'have black screen not a blue screen..
i search ... have a good day