Shenzhou Ares K610C laptop can be turned on without displaying maintenance information on the screen

Machine model: Shenzhou Ares K610C

Malfunction: the laptop can be turned on, the screen is not displayed, the power is plugged in and automatically powered on, and the current is 0.6.

Shenzhou Ares K610C laptop can be turned on without displaying maintenance information on the screen Figure 1.

Maintenance process: the green light in the lower left corner of the motherboard will be on. Test the motherboard PL10 3.3V, PL11 5V, PL9 1.4V, PL8 1.05V, memory Inductor PL2, CPU VCC and graphics card VCC.

Referring to the post posted in the next forum, some people say that this machine will only get out CPU VCC when it comes out of memory VCC first. Check the conditions of memory VCC. PU2 G5616 is a memory VCC chip, which has not been encountered before, and the definition of introduction is a bit unclear.

Shenzhou Ares K610C laptop can be turned on without displaying maintenance information on the screen Figure 2.

2 pin VTT, thought it was the chip owner VCC, but couldn’t find out where it came from. Later, it became clear that this is 1.35V from memory VCC chip.

Shenzhou Ares K610C laptop can be turned on without displaying maintenance information on the screen Figure 3.

Shenzhou Ares K610C laptop can be turned on without displaying maintenance information on the screen Figure 4.

PU2 operation requires 10 pin S3 and 11 pin S5 to be high before output. 10 pin 5V is available, 11 pin 5V is not available, analysis of 11 pin, pq1a2 pin susc # 3.3v pq1a is on, 6 pin is pulled low, 5 pin is at low level, PQ1B is off, 3 pin should be at high level 5V, and measured 3 pin is 0.

The PQ1 tube was removed, and 11 pin S5 5V came out. At this time, the test memory VCC 1.5V came out, and the current went up to more than 1A, and the screen booting up was connected. It seems that PQ1 is still broken. Find such a double-field tube on Parts motherboard and replace it with OK, and the maintenance is over.