Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 11:07 PM
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Replies: 9
Views: 301
Re: Probook 640 G1 turns on when adapter connected
What i wrote about voltage transfer on Q7050 is absolutely correct. You seems not to understand it. SLP_S3_5R must be 3V in off condition and it should pull low only when turned on. So you need to...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 07:16 AM
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Replies: 9
Views: 301
Re: Probook 640 G1 turns on when adapter connected
TPS51225 is your 3V/5V PWM IC. Q7055 gate should be High so that ground(pin2) travels to source(pin3) as its a n channel mosfet. Once the ground reaches pin3, it will block P15VOA line and voltage...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-21-2022, 10:50 PM
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Replies: 26
Views: 1,487
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-20-2022, 10:51 PM
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Replies: 7
Views: 186
Re: How can we prevent 19v entering SOC?
Manufacturers knows the solution and have all the know how to implement it but the fact of the matter is they dont want to do it. The aim is simple-so that it doesnt last long enough. A HP loyalist...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-19-2022, 11:07 PM
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Replies: 5
Views: 244
Re: ASUS ViviBook X512F no power
To mee it seems like a coil. Make sure whether its a coil or fuse. Remove the part and check resistance on both the pads. If the resistance is high, you can solder similar fuse/coil(located near lvds...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-19-2022, 11:01 PM
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Replies: 22
Views: 739
Re: HP Probook 450 G6
You dont have a dc supply?? If yes, then measure SDA/SCL/DRAMRST# on ram slot. It's very important to see activity on SDA/SCL lines and that can be observed only on DSO. If you dont have these tools,...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-16-2022, 10:49 PM
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Replies: 5
Views: 269
Re: HP 15-BW la-e831p vga problem.
I think removing those 3 coils will make it UMA(LA-E801P, uma works by removing these 3 coils). The board looks very similar to LA-E801P and only the platform differs-INtel Vs AMD. Are you sure where...
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-15-2022, 10:58 PM
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Replies: 22
Views: 739
Re: HP Probook 450 G6
You mean voltage or current consumption?? Are you using a dc supply to power the machine or adapter??
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-15-2022, 10:55 PM
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Replies: 45
Views: 1,118
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-14-2022, 11:05 PM
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Replies: 2
Views: 227
Re: dell la-d071p
Open the schematics, press ctrl+F and then type "RTC" and press next. Check each and evry point. Cmos cell should be 3V and inseted in the socket. No power connected to the mb.
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Forum: Troubleshooting Laptops, Tablets, and Mobile Devices
06-14-2022, 10:58 PM
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Replies: 22
Views: 739
Re: HP Probook 450 G6
There can be n number of issues. When ram is not installed, mb doesnt rech S0 state,so will remain relatively cool as many rails dont come up. But thats not the point. You need to observe dc supply...
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