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Search: Posts Made By: grimacelord
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-16-2022, 03:25 PM
Replies: 3
Views: 272
Posted By grimacelord
Re: Apple iPad Pro 3rd Generation 12.9" (A1876) No Power/Charge When Screen Is Connec

820-01435-A is the logic board part number.



No. The iPad Pro 12.9" 3rd Gen shares the same display assembly with an iPad Pro 12.9" 4th Gen. I have purchased 2 different screens from a...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-15-2022, 12:11 PM
Replies: 3
Views: 272
Posted By grimacelord
Re: Apple iPad Pro 3rd Generation 12.9" (A1876) No Power/Charge When Screen Is Connec

So it looks like Pins 29 and 27 are the I2C data lines for the display connector. I2C_TCON_SCL_1V8_CONN and I2C_TCON_SDA_1V8_CONN, respectively.

Pin 29 (I2C_TCON_SCL_1V8_CONN) connects to C4565...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-15-2022, 11:06 AM
Replies: 3
Views: 272
Posted By grimacelord
Apple iPad Pro 3rd Generation 12.9" (A1876) No Power/Charge When Screen Is Connected

Hello.

Working on an Apple iPad Pro 3rd Generation 12.9" that has a weird issue. When the display is NOT connected, the iPad will charge and power on normally. I know it's on because I can hear...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 02-02-2022, 02:02 PM
Replies: 5
Views: 289
Posted By grimacelord
Re: Dell LA-C571P - Won't Charge - Battery 255%

Well, thanks for your help mon2. You lead me on the right track and I was able to solve it from there. The charging IC was to blame. I just so happened to have a donor board that had separate issues....
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 02-02-2022, 08:47 AM
Replies: 5
Views: 289
Posted By grimacelord
Re: Dell LA-C571P - Won't Charge - Battery 255%

Pin 15 VFB: 1.5mV
Same voltage on both sides of resistor PR726




Not sure if you wanted these measurements with or without battery installed. Here are the voltage readings WITHOUT the battery...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 02-01-2022, 04:37 PM
Replies: 5
Views: 289
Posted By grimacelord
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 02-01-2022, 04:01 PM
Replies: 5
Views: 289
Posted By grimacelord
Dell LA-C571P - Won't Charge - Battery 255%

Hello,

This motherboard reports that no battery is installed, although it will power on from the battery if there is a charge on it. It also will not charge the battery and reports the percentage...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 12-07-2021, 12:08 PM
Replies: 2
Views: 262
Posted By grimacelord
Re: 820-4924 - No Power - Gets Green Then Orange Light

Thanks for the tips. :d

I went back and sort of studied the schematic. That lead me to U8030. I pulled it and a couple of it's pads looked kinda crappy, so I cleaned them and reballed U8030. Not...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 12-04-2021, 11:09 AM
Replies: 2
Views: 262
Posted By grimacelord
820-4924 - No Power - Gets Green Then Orange Light

Board had previous liquid damage. It was initially ultrasonic cleaned. Keyboard, battery, and trackpad flex cable were all replaced and it worked fine. Board is back for no power. Hoping someone can...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-20-2021, 08:08 AM
Replies: 3
Views: 592
Posted By grimacelord
Re: ASRock AMD Radeon RX 5500 XT Causes Computer To Lose Display Until Forced Reboot

To anyone interested, I reflowed two of the VRAM chips that had some odd looking balls under it (when viewed at an angle under a microscope). Problem seems to be fixed. OCCT and GpuMemTest no longer...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 11-19-2021, 11:06 AM
Replies: 3
Views: 592
Posted By grimacelord
ASRock AMD Radeon RX 5500 XT Causes Computer To Lose Display Until Forced Reboot

Hello. I have an AMD Radeon RX 5500 XT Phantom Gaming D 8G OC video card that recently began to give me trouble after 1 year of perfectly fine usage.

The problem initially began after a year of...
Forum: Troubleshooting TVs and Video Sources 11-03-2021, 03:10 PM
Replies: 3
Views: 368
Posted By grimacelord
Samsung UN50MU6070FXZA - HDMI Ports Not Working

Hello. Samsung UN50MU6070FXZA here with both HDMI ports non-working. I have already verified multiple sources and multiple cables to ensure it isn't something simple like that as well as resets and...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 09-21-2021, 11:27 AM
Replies: 2
Views: 654
Posted By grimacelord
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 09-21-2021, 09:11 AM
Replies: 2
Views: 654
Posted By grimacelord
Need Help Identifying Component For Printer Main Logic Board HP M570DN

Hello. I know that I am asking for help with a printer, but this is specific to the printer's logic board so I figured it would be best suited under the motherboard repair forum - please move if...
Forum: Troubleshooting TVs and Video Sources 09-15-2021, 07:43 AM
Replies: 1
Views: 430
Posted By grimacelord
TCL 50S425 Roku TV Boot Loop

Hello again. This time it's a TCL 50S425 Roku TV that is stuck in a boot loop.

https://i.imgur.com/PbNXDvl.jpeg

The TV will power on, display the TCL logo for a few moments, and then the TV...
Forum: BIOS Requests ONLY! 08-19-2021, 09:06 AM
Replies: 7
Views: 321
Posted By grimacelord
Re: Lenovo Flex 14IWL Bios Editing Help

Awesome! It worked! I flashed your BIOS image and as soon as I pressed power and saw a fan spin, I knew it was going to be fixed. Of course, I waited for full boot and I can happily report that it is...
Forum: BIOS Requests ONLY! 08-19-2021, 08:13 AM
Replies: 7
Views: 321
Posted By grimacelord
Re: Lenovo Flex 14IWL Bios Editing Help

Well, I followed everything twice and I am not getting that SHA-1 checksum you have. After two separate attempts, two different test bios files I made, I get the same checksum, but it isn't matching...
Forum: BIOS Requests ONLY! 08-19-2021, 05:02 AM
Replies: 7
Views: 321
Posted By grimacelord
Re: Lenovo Flex 14IWL Bios Editing Help

Nice, thanks!

I'll try this once I get to work later and come back to let you know how it went. Thanks again.
Forum: BIOS Requests ONLY! 08-18-2021, 02:54 PM
Replies: 7
Views: 321
Posted By grimacelord
Re: Lenovo Flex 14IWL Bios Editing Help

Oh, crap. Can a mod move this to the BIOS requests section? I didn't see until after I posted. Ugh. Sorry!!!
Forum: BIOS Requests ONLY! 08-18-2021, 02:49 PM
Replies: 7
Views: 321
Posted By grimacelord
Lenovo Flex 14IWL Bios Editing Help

Hello,

I have a Lenovo Flex-14IWL here that I believe might be suffering from a corrupt BIOS. The device tries to power on, but black screen and no fan spin. The power LED then quickly turns off....
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-20-2021, 08:56 AM
Replies: 30
Views: 2,004
Posted By grimacelord
Re: HP 15-dk LA-H462P - 5 long 3 short caps blinks.

Alright took me a minute to get all the measurements on the pic, but this is what I am looking at now.

It appears to me that the path of voltage ends at the ON Semi NCP81253MNTBG where it should...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-20-2021, 08:21 AM
Replies: 30
Views: 2,004
Posted By grimacelord
Re: HP 15-dk LA-H462P - 5 long 3 short caps blinks.

Ok. This is really weird. I went and looked at the schematic and searched for some of those pins you asked me to check earlier. I started with Pin 15 VRMP of the NCP81215. In my first measurement, I...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-20-2021, 08:07 AM
Replies: 30
Views: 2,004
Posted By grimacelord
Re: HP 15-dk LA-H462P - 5 long 3 short caps blinks.

It appears like it might be SY8270CTMC. Could be wrong though. If I'm correct, pinout can be found on page 85 of attached schematic. 5.16V is present at the coil (PL302) next to this component.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-20-2021, 07:54 AM
Replies: 30
Views: 2,004
Posted By grimacelord
Re: HP 15-dk LA-H462P - 5 long 3 short caps blinks.

Found it. BTXCGB is on the component.

Pic:
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-19-2021, 09:54 AM
Replies: 30
Views: 2,004
Posted By grimacelord
Re: HP 15-dk LA-H462P - 5 long 3 short caps blinks.

Well, I purchased NCP81215 power management IC, the NCP81253MNTBG MOSFET gate driver, as well as the EMB09A03HP N-channel MOSFET. I guess I'm going to just try replacing them and see what happens....
Showing results 1 to 25 of 138

 
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