GA- Z77-D3 does not run out of code, and after 3 seconds power failure repair

GA- Z77-D3 does not run out of code, and after 3 seconds power failure repair

GA- Z77-D3 does not run the code, and after 3 seconds of power failure, replace Q16, and directly power on to run the code.

Machine model: GA- Z77-D3

Fault phenomenon: do not run code, and power off after 3 seconds

Maintenance process: Gigabyte z77-d3 does not run out of code, and the power is cut off after 3 seconds. In case of this, I usually brush BIOS first. BIOS is on the official website of gigabyte in Taiwan. If it can be downloaded, I will no longer upload it.After brushing the BIOS, the problem is still the same. You can’t use the battery to discharge.

So he took out multimeter and checked all the work VCC. Later, it was found that the CPU VCC and the core display VCC did not work. This is the fundamental reason for not running code. The CPU did not work. It must be that PG did not come out. So we checked schematic on Xinzhizao Soft. The summary is as follows:

GA- Z77-D3 does not run out of code, and after 3 seconds power failure repair Figure 1．

This board has been repaired a lot, and the failure rate is basically the following:

1. IO 126-128 pin vin2 detects VCC fault

2. The CPU en next to CPU fan is normal, also change it

3. VTT VCC missing

4. Vrmpwrgd abnormal VCC low

5、BIOS

6. Overclocking chip 8

Find the cause of the fault, replace Q16, power on directly and run the code. This fault is repaired and the maintenance is finished.

GA- Z77-D3 does not run out of code, and after 3 seconds power failure repair Figure 2.