Repair of Raytheon TR-G150T Notebook for "Bone Scraping and Healing" without Booting

Repair of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting

Opening the drawing, it was found that VDD3 at one end of PR435 was broken. Isolate the protection tube PQ47 PQ18, and directly connect the DS pin of PQ30 pin to make them completely conductive.

Machine model: Raytheon TR-G150T

Main board number: 6-71-N15R0-D02A

Fault symptom: the notebook does not turn on.

Maintenance process:

A Raytheon notebook, the fault is that the notebook does not turn on, and the motherboard is burned like this.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 1

Maintenance of Raytheon TR-G150T notebook for “bone scraping and healing” without turning on Figure 2

The burn was too serious, and the last family said to change the motherboard and bring it here for maintenance. The scraper should be repaired first, unlike changing the motherboard again.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 3

The wider the scraping range, until the resistance value of the common point becomes normal, and the power supply is not short-circuited, then the standby chip is hot for 0.23, and the inductance with a power outage of 3.3V is short-circuited, and the machine is burned, and the EC is hot. Remove the resistance value and return to normal.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 4

Maintenance of Raytheon TR-G150T notebook for “bone scraping and healing” without turning on Figure 5

The EC chip IT8587E has a program. After replacement, the plug-in standby is normal, with 3.3V Press the switch and it will not trigger. There’s still a disconnect. Opening the drawing, it was found that VDD3 at one end of PR435 was broken.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 6

The flying wire was added, and the VA at pin 4 of PQ16 battery discharge tube was disconnected, and it was connected from the flying wire of the power head.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 7

U41′ s foot VA is broken, so make it up.

Maintenance of Raytheon TR-G150T notebook for “bone scraping and healing” without turning on Figure 8

Maintenance of Raytheon TR-G150T notebook for “bone scraping and healing” without turning on Figure 9

Isolate the protection tube PQ47 PQ18, and directly connect the DS pin of PQ30 pin to make them completely conductive.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 10

The effect diagram after processing.

Maintenance of Raytheon TR-G150T Notebook for “Bone Scraping and Healing” without Booting Figure 11

Plug it in and turn it on, and the current runs all the way, but the running code just doesn’t light up. All the voltage of the whole board has been measured. Configure ME, brush the BIOS program, and then turn it on. The long-lost Raytheon LOGO comes out and enters the system for testing. Everything is normal except that it can’t be charged, and the maintenance is over.