My wife dropped her SX45 phone directly on the power button. The damage done was that the surface mount switch beneath power button was knocked off as well as a surface mount capacitor beneath the power switch. The switch is intact, but the capacitor is nowhere to be found so I don't know it's value. I don't have the XDA in front of me, but I think the capacitors reference is "C104". Thanks.
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ARIA power button frex cable ripped.
Is there any solution to recover it? Anyone knows pinout on mainboard?
No, sorry. The power button is part of the flex cable. You must change the entire flex cable.
You can turn on the phone plugging it to your computer or charger then inserting the battery.
Hello,
This is a little bit old of a thread, however if you have not solved your issue there is a hardware solution. I own an electronics repair store (iRepairNational.com) and we just had a customer in who ripped that flex cable trying to repair the screen. The general steps are:
1) Cut the button PCB portion off the remaing flex cable, remove the tape and metal button cap and solder two micro leads to the button PCB; one to the inner disc (cut a small notch into the side of the PCB so you can access the inner disc without shorting against the outer disc) and one to the outer disc.
2) Solder one of the micro leads to ground, any ground will work.
3) If you examine the bottom of the PCB where the flex originally was sandwiched, you will see two micro SMT resistors. Solder the second lead to the leftmost of the two resistors. Take CARE not to de-solder that SMT resistor by getting it too hot.
4) You will need to flow solder onto the two discs you soldered the leads to originally so the leads do not create bumps preventing the button cap from springing correctly.
5) Replace the button cap/tape and install your now working power button
If this is a little more than you want to get into or you don't have micro soldering tools, we perform the repair for $48.
The power button on a samsung note 2 that I inherited fails to work. The phone was left outside and rained on so when I first got it the screen did not work and I thought it was going to be trash however after drying it out and properly cleaning it the device screen works now and it will turn on when plugged in. I have one of the dongles that forces the phone into recovery but the power button just plain does not work. I don't know what to do but I would like to be able to use this phone.
I've dismantled a few of these phones and once I ruined a power button while sliding the the tool past it to pop the case apart. The power button is part of another assembly but can be replaced. Any version of the phone (Sprint/ATT/etc) will use the same subassembly for the power button. If that is the problem, you can swap it out.
Otherwise, you may have corrosion issues. I have brought older "dumb" phones back by spraying the circuit boards w/electrowash cleaner, scrubbing w/a toothbrush, and blowing off with an air compressor. Be sure to remove all ribbon connectors and scrub both sides of the connector. Also: DON'T JUST SPRAY THE PHONE WITH THE BACK OFF! the electrowash will stay visible the display, so do this in a controlled manner.
My springboard tablet stopped working without being plugged in almost as soon as I got it from T-Mobile. It fell from a height of about one foot onto a carpeted surface and stopped working. I finally opened it up and found out that the bracket that clipped and attached the the battery to the circuit board had cracked and broken away from the board. And I couldn't figure out how to solder such fine solders with my limited equipment and experience. My dilemma is that since it only works when plugged in, it automatically turns on when plugged in and I can't do the hard reset by holding the power button down and the volume down button until it vibrates and then pushing the volume up button. Does anybody have any suggestions on how to return the device to stock condition. How can I work around this hardware fault.
There are many reasons due to that Samsung Galaxy S7 edge won’t turn on. As for won’t power on accompanied with 50mA-80mA boot current, the first thing we do is to check power supply voltage. If nothing goes wrong, the fault is most likely to be related to CPU. If there is abnormal voltage measured, then check corresponding faulty position on the board. The fault component is finally confirmed as PMIC U7003, our focus today would be to fix this issue. We can fix the issue by replacing with a new PMIC. Now, follow the instructions given below:
Before Repair Test
Press the Galaxy S7 Edge power button, the phone won’t turn on. Then take out the SIM card tray and logic board.
Fault Analysis
First, we need to confirm whether the boot current is normal, for better measurement, apply tins to the battery connector and solder a length of red supply wire.
Trigger with tweezers to power on the phone, current reading on the ammeter is 50mA(For 50mA boot current of the phone). The fault is usually related to CPU and main power supply voltage.
Next, let’s measure the voltage outputted from PMIC, measure PP_0V8, PP_0V85, PP_1V8, PP_2V95, PP_1V25, PP_1V15 and PP_0V8
Fault Detection
Disconnect the power supply, remove the shield plate. And then trigger with tweezers to power on the phone, measure L7012, L7011, C7067, C7044, C6040, L7015 and L7004 one by one.
The measured voltage of C7067 is lower than the normal value (Normal value should be about 1.8V).
Now, we can confirm now that the fault component is PMIC U7003.
Repair
We need to replace a new PMIC.
First, remove shield plate on PMIC with Cutting Nipper, then heat up with Hot Air Gun.
Detach PMIC from the board, apply some Paste Flux to the bonding pad. Remove tins on the pad with Soldering Iron.
Remove tins thoroughly with rosin soaked Solder Wick, once done, clean with PCB Cleaner.
Apply some Paste Flux to the bonding pad, get a new PMIC in position and solder with Hot Air Gun. Once done, wait for the logic board to cool for 5 minutes, at last, clean with PCB Cleaner afterwards.
After Repaired Test
Now we can assemble the phone and test.
Get the logic board installed, connect the battery, get the loudspeaker and wireless charging coil installed.
Press the power button to power on, the phone turns on normally.
Samsung Galaxy S7 edge won’t turn on issue fixed perfectly.
Attaching the video link of S7 edge won't power on MOD Edit:- Content Removed.
Does anyone know where the back light fuse is on the logic board I didn't unhook my battery before replacing my screen so now I need to bridge the fuse thanks lots.
odjono said:
Does anyone know where the back light fuse is on the logic board I didn't unhook my battery before replacing my screen so now I need to bridge the fuse thanks lots.
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That's what technician who was replacing my broken screen did. He replaced the screen while tablet was on and busted display circuitry on the motherboard, not the fuse. It had to be fixed on the component level.
I put a drop of solder on it with my solder Pen so that the two ends gets connected and it actually worked. the fuse located on the MOTHERBOARD right above the screen connector on the right side. it's really small and is marked with a “v” thats barely visible with your eye: I did this and the back light works. Ifixit has a picture