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820-2936 no thunderbolt

Thread starter Kyle93
Start date Apr 30, 2020

K

Kyle93

Active member

#1

Customer complained of no thunderbolt. No liquid damage. What to check first? 3.3V on both sides of D9425.

2informaticos

Administrator

Staff member

#2

Check solders, traces and adiacent components of J9400.
T29_A_HV_EN goes high when connect a Thundebolt device?

K

Kyle93

Active member

#3

Solders traces and components of J9400 look fine.

T29_A_HV_EN 0V with connected thunderbolt device

2informaticos

Administrator

Staff member

#4

Refering to J9400, check DP_PWR and HOT_PLUG_DETECT, w/ and w/o TBT device connected.

K

Kyle93

Active member

#5

solved on its own after measuring for DP_PWR

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