Gigabyte GTX970 graphics card runs 3DMRAK screen is black or frozen repair

Gigabyte GTX970 graphics card runs 3DMRAK screen is black or frozen repair

Graphics card model: Gigabyte GTX970 graphics card

Fault symptom: the graphics card runs 3DMRAK screen is black or frozen

Maintenance process:

A piece of Gigabyte GTX970 graphics card, the computer tests screen is black or frozen as soon as Master Lu runs, sometimes the screen is blank, MATS is tested, naturally there is no problem, then running MOD is also a PASS, and memory overclocking runs the same PASS.

Gigabyte GTX970 graphics card runs 3DMRAK screen is black or frozen maintenance figure 1.
I thought that the core Inveracious Soldering was gone. I got on Repeat welding, and found that I could follow Master Lu. Half of the trouble of running 3DMRAK appeared again. I judged that VCC had a problem.

Gigabyte GTX970 graphics card runs 3DMRAK screen is black or frozen maintenance figure 2.

Oscilloscope measures that several Inductor and PWM wave turns on normally. According to past maintenance experience, this kind of fault can also occur due to poor filtering. I found six desktop Capacitor on the back soldering, which can finish the 3DMARK. I wanted to replace six small Capacitor. After testing, I found that there were several patches Capacitor next to the core Capacitor Inductor that were not loaded. I directly installed three 330 small Capacitor, and all the tests were normal.

Gigabyte GTX970 graphics card runs 3DMRAK screen is black or frozen maintenance figure 3.