Hi, i have 2 docks which do not output a signal to the TV, but when i plug in a Switch it gets charged.
The Switch is not the Problem because it works fine in a known good dock. I also tried it with different switches. Do you know which chip is responsible for the video output in the doch ?
What order did you plug in the AC adapter & HDMI? Apparently there is a specific order. AC adapter first and to a wall outlet. Then the HDMI to the dock, and then to the TV.
I was having the exact same issue and this solved it. No problems since then.
Hi,
like i sayed above i tested with two differnt known good Switches and neither showed a picture with the bad dock. When i take my known good dock everything works like it should. So the switch is not at fault. It must be a fault on the dock mainboard.
Hi, most of the points i tested did not give me a reading and when it did it was only half or double the value you wrote down. While i tested i noticed that the marked (light blue)“caps?” were shorted to ground on both sides. Is that normal?
I also checked the Filters. They have continuity.
When you need the proper values i can write them down.
I measured different boards a few times and I m allways getting this values at all test points plus minus ~20 mV. I also compare my values with an other multimeter and got nearly the same readings.
Did you put the red probe on ground and measure with the black probe at the testpoints?
The blue marked components have ground on both side.
I now have a second dock with no output to tv. Both have at the testpads blue 6 and 8 “oL”. Did anyone knows where this lines goes to? And is the VLI ic exchangeable?
I had a couple that shorted the yellow pad 13, replace with the big chip next to it and it works.
The others were the chip on the other side of the board. Theres two testpad there that suppose to have 0.001 reading or so, if its bad it has some other reading like 0.5 in diode
I measured a known good working dock again and you are right with OL at blue pin 6 and 8. I tested all testpads again and the pins at the big ics (m92t15/m92t17/VLI/ST) on the defect board but nothing obvious like a short or OL.
I have the opposite problem. 3 boards with a reading on testpad 6 and 8, probably gonna start removing ICs to see which one clears it. I see its its runs to the VLI ic but replacing that IC does not change the value for me so it has to be another crossover somewhere