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Search: Posts Made By: reformatt
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-09-2022, 08:45 PM
Replies: 2
Views: 99
Posted By reformatt
Re: lenovo 300e 2nd gen dead

USB-C doesn't work like that. Channel configuration pins on either side (CC1/CC2) detect when it's plugged in and power is only thereafter. Get a USB-C ammeter to establish what is happening with the...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-09-2022, 08:32 PM
Replies: 2
Views: 110
Posted By reformatt
Re: how to test power button when it is on keyboard

Power buttons on keyboards can be metered usually at the last two pins of the keyboard connector, at least this is what I've found so far. One of the two will be ground of course, determine that with...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-08-2022, 06:32 PM
Replies: 18
Views: 306
Posted By reformatt
Re: Alienware 15 R3 Motherboard Issues Help Plz!

Replace the battery first. Some charger designs utilise power from the battery when the system power requirements exceed that of the adaptor. Given your adaptor shuts off, that is the likely scenario.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-08-2022, 01:23 AM
Replies: 7
Views: 113
Posted By reformatt
Re: Macbook pro 15" 2018. keyboard backlight not working

You can run a MAC in clamshell mode if the screen is U/S, no need to remove it. Allows you to at least set it up on external monitor, you just need an external USB-C hub that supports HDMI, power...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-07-2022, 11:15 PM
Replies: 7
Views: 113
Posted By reformatt
Re: Macbook pro 15" 2018. keyboard backlight not working

The previous models use an ambient light sensor in the screen to turn it on/off. Wastes battery if it's daylight, so it's switched off in that case. So with that missing, I'd say that's your issue.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-07-2022, 11:10 PM
Replies: 2
Views: 92
Posted By reformatt
Re: 820-00165 no power, 08-80ma, PM_SLP_S4_L is pulsing.

Check for corrosion on the JTAG connector (J6100), that's a more likely cause. Also check termination resistors for corrosion etc around U6100 and the connecting resistors to the CPU (around middle...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 08-07-2022, 09:51 PM
Replies: 6
Views: 986
Posted By reformatt
Re: Mack book pro A1707 lcd problem

Apple have (or had) a service program for it, however its confined to 2016 models only. Since they were only manufactured from October 2016, it only covers about 3 months worth. It's the same issue,...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-28-2022, 11:30 PM
Replies: 0
Views: 74
Posted By reformatt
SVOD3 debug ZIF programming PCB

Recently got this off the SVOD team, but it came needing assembly plus some 10K resistors. I used the PDF on their website to configure the jumpers/resistors, but can't get it to recognise any ITE,...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-28-2022, 05:17 PM
Replies: 2
Views: 173
Posted By reformatt
Re: Asus X550CC (F550D) component identification

Thank you, this boardview is different to the one I had and does show the values.

This section is under a plastic sheet so I'm thinking it's more likely to be a dead bug decomposing etc.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-27-2022, 11:06 PM
Replies: 2
Views: 173
Posted By reformatt
Asus X550CC (F550D) component identification

Have a X550CC motherboard with some slight liquid damage. There are 3 corroded resistors; PR8512, PR8513 and PR8516. The first one (PR8512) is missing off the board, but very well have fallen off. I...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-11-2022, 08:23 AM
Replies: 25
Views: 563
Posted By reformatt
Re: Acer Spin 5 - Turns on and off after a few seconds

A lot of weird power issues on Acers are usually keyboard related, as power button is integrated. Original fault fits what I’ve seen. Disconnect keyboard and power on by shorting the 2 end pins of...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-07-2022, 12:52 AM
Replies: 1
Views: 106
Posted By reformatt
Re: x541uvk r2.0 motherboard no display

Just had that exact same model here with 80ma current draw. No schematics for this one either.

I did the same with BIOS and EC. There is no response at all with power button. Thermal camera showed...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 07-06-2022, 11:06 PM
Replies: 18
Views: 512
Posted By reformatt
Re: Macbook Air A1465 - 820-00164-A , No reaction to power button

PPBUS_G3H will be around 8.3V with no SMC comms to the ISL, otherwise should be 8.6V. When the board is out of the chassis and no battery connected, the board should start up when power is applied....
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 07-06-2022, 06:38 PM
Replies: 5
Views: 289
Posted By reformatt
Re: iMac 27 Late 2013 - Fan noise , OS very slow

From memory, that error code means some sensor data is missing (hence the throttling and high fan speed). I think Apple Hardware test only supports iMacs up to early 2013 unfortunately. You'll need...
Forum: Schematic Requests ONLY! 07-06-2022, 12:21 AM
Replies: 5
Views: 194
Posted By reformatt
Re: MacBook Air 1466 820-00165 I/O board schematics

There aren't any schematics for the boards used in 2013~2017 Air's. The one wire circuit is identical though to previous MAC's (where these components were on the main board) so isn't too hard to...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-30-2022, 05:07 PM
Replies: 18
Views: 512
Posted By reformatt
Re: Macbook Air A1465 - 820-00164-A , No reaction to power button

PPBUS_G3H should be measured with battery disconnected. Check for corrosion or evidence of liquid ingress (especially around the SMC). Usually if you get a single pulse of voltages up to Vcore it's...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-30-2022, 03:41 PM
Replies: 9
Views: 199
Posted By reformatt
Re: Macbook Air A1466 820-000165 Fan allways on 6200rpm

Confirm prescence of fan tach using a scope to the SMC. If it’s missing, fan will be driven at full speed.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-30-2022, 09:02 AM
Replies: 6
Views: 260
Posted By reformatt
Re: laptop screen pull glue strips

I managed to get some Tesa bond and detach (product number was 70465) from adhesives.com.au about 18 months ago. They custom cut a few rolls to the widths I wanted (6mm and 10mm). Cost me about $50 a...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-30-2022, 08:45 AM
Replies: 2
Views: 135
Posted By reformatt
Re: Macbook Pro early 2011 - no audio

Board number would help. Track/via damage is the most likely suspect around that area. Via's can be underneath the resistor track pad itself or the test point. If one end of that resistor is going...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-30-2022, 08:24 AM
Replies: 4
Views: 144
Posted By reformatt
Re: Macbook Air A1466 2013 reboot and kernel panic

That's corrosion. Check all pads/via's in that area for continuity to other nets using the boardview.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 06-22-2022, 05:38 PM
Replies: 0
Views: 205
Posted By reformatt
Giada embedded PC DE67

Customer brings in this embedded PC DE67-N1-7200 made by Giada (Giadatech). It's completely dead. Just a little over 2 years old and just out of the extended warranty he purchased.

Was only...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-20-2022, 11:40 PM
Replies: 7
Views: 238
Posted By reformatt
Re: How can we prevent 19v entering SOC?

The OEM's could put an avalanche diode or some other voltage transient device in there if they wanted to. But they don't. And they could have insisted Intel et al to keep using socketed designs...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-09-2022, 08:35 PM
Replies: 2
Views: 187
Posted By reformatt
Re: Lenovo NM-B421 carnage

Apparently the unit was dropped - can't see how that marries up with the damage seen. Anyway, ended up writing it off as likely to have CPU/PCH issues.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-09-2022, 05:56 PM
Replies: 2
Views: 187
Posted By reformatt
Lenovo NM-B421 carnage

Lenovo E480 with NM-B421 motherboard came in dead. Pulls about 300ma @ 20V via USB-C and no reaction to power button.

PU702 (NB691GG-Z) for +1VALWP was clearly shorted, along with PU801...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 06-07-2022, 09:47 PM
Replies: 2
Views: 156
Posted By reformatt
Re: Casper MT55INP1.V.01 Laptop immediately shuts down after power button is pressed

A lot of pins on an embedded controller are general purpose and what they do is determined by its programming. Need a schematic as a rule to troubleshoot logic issues around them.

With the these...
Showing results 1 to 25 of 348

 
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