Gigabyte GV-R939G1 gaming-8gd rev. 1.0 brak obrazu.

Witam, po zdjęciu Q4030 nadal zwarcie bramki do drenu 1,2om. Q4029 też zdjęty ponieważ obudowa była nadtopiona na środku. Gdzie mógłbym dalej szukać uszkodzenia? Do tej pory nie miałem styczności z kartami graficznymi.

Hello!

The schematic for this card is currently not available. Please, post a pictures from both sides of the board. Also post a picture of transistors Q4029, Q4030 area of the board with nearby surroundings.

̶̶̶̶̶̶̶̶T̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶"̶̶̶̶̶̶̶̶D̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶"̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶f̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶w̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶y̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶.̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶R̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶v̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶f̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶w̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶G̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶-̶̶̶̶̶̶̶̶S̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶G̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶-̶̶̶̶̶̶̶̶D̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶f̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶v̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶.̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶I̶̶̶̶̶̶̶̶f̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶w̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶(̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶k̶̶̶̶̶̶̶̶Ω̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶)̶̶̶̶̶̶̶̶,̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶"̶̶̶̶̶̶̶̶D̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶"̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶.̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶T̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶p̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶y̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶N̶̶̶̶̶̶̶̶C̶̶̶̶̶̶̶̶P̶̶̶̶̶̶̶̶8̶̶̶̶̶̶̶̶1̶̶̶̶̶̶̶̶1̶̶̶̶̶̶̶̶6̶̶̶̶̶̶̶̶2̶̶̶̶̶̶̶̶.̶̶̶̶̶̶̶̶
̶̶̶̶̶̶̶̶A̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶c̶̶̶̶̶̶̶̶k̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶e ̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶r̶̶̶̶̶̶̶̶,̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶f̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶n̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶m̶̶̶̶̶̶̶̶a̶̶̶̶̶̶̶̶g̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶(̶̶̶̶̶̶̶̶i̶̶̶̶̶̶̶̶t̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶s̶̶̶̶̶̶̶̶h̶̶̶̶̶̶̶̶o̶̶̶̶̶̶̶̶u̶̶̶̶̶̶̶̶l̶̶̶̶̶̶̶̶d̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶b̶̶̶̶̶̶̶̶e̶̶̶̶̶̶̶̶ ̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶̶4̶̶̶̶̶̶̶̶,7̶̶̶̶̶̶̶̶Ω̶̶̶̶̶̶̶̶).̶̶̶̶̶̶̶̶


EDIT:
Sorry, there are dual bottom transistors on the board, so the highlighted transistor (picture below) may be guilty for a short circuit. This transistor should be replaced, regardless of whether, if it is damaged or not.
First remove this transistor from the board and check the resistances between Gate-Source and Gate-Drain of both removed transistors on the top side of the board.

There are also separated "Gate driver" chips on the board, so if removing the suggested transistor will not resolve a short circuit, one of the the "Gate driver" chips is damaged (also highlighted on the following picture).

Po zdjęciu tranzystora rezystancja S - G =0. Zwarcie w jednym z dwóch tranzystorów również ustąpiło.
Co nazywamy odpływem bramki? Rezystancje między S - G mam zmierzoną ale teraz nie bardzo wiem jak mierzyć rezystancje między źródłem - bramką a odpływem bramki obu usuniętych tranzystorów.

dawido77 ha scritto:Co nazywamy odpływem bramki? Rezystancje między S - G mam zmierzoną ale teraz nie bardzo wiem jak mierzyć rezystancje między źródłem - bramką a odpływem bramki obu usuniętych tranzystorów.

As far as you probably know, the MOS-FET transistor has a three pins - Gate (G), Source (S) and Drain (D).
If you know, how to measure the S - G resistance, all other resistances are similar, just mesured between the different pins of transistor.


However, instead of suggested resistances, measure the resistances between listed pins of "Gate driver" chip highlighted in the second picture in post #4:
a) Between pin 1 and pin 8.
b) Between pin 4 and pin 5.
c) Between pin 5 and pin 6.
d) Between pin 7 and pin 8.

Rezystancje między pinami sterownika bramki:
1 - 8 = 0 om
4 - 5 = 0 om
5 - 6 = 0 om
7 - 8 = 0 om

dawido77 ha scritto:Rezystancje między pinami sterownika bramki:
1 - 8 = 0 om
4 - 5 = 0 om
5 - 6 = 0 om
7 - 8 = 0 om

If there is a short circuit between all of the pins, the "Gate driver" chip is damaged for sure.

Remove this chip from the board and remeasure all suggested resistances on the place of that chip. Also measure the resistance between pin 4 and pin 6 on the place of that chip.