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To replace the sensor, you have to take out the front panel PWB of the TV out from it. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Disassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.
It sounds like you have corrupt kernel files that allow the system to boot properly. if your phone just sits at the boot logo then something is corrupt. You will have to find the phones OS firmware file online, and put the phone into Disk Mode/Advanced Mode, and either find software you can access the firmware through on your computer, or you will need to take the working firmware file you find online, load it onto a micro SD card and then load the firmware onto the phone from there.
To access this mode (Disk Mode) on your phone do this:
1.Power off your phone
2.Press together volume up + home button (little house)+ power button
3.When Samsung logo appears releases your fingers from the buttons.
4. You will then see a list of options you can select, SD card boot, or SD card firmware upgrade or something along those lines.
From there you can load the proper working firmware to your phone from an SD card, or from the vendors software that can access the phone on a root level.
If the above wasn't an issue, then you may just need to charge it fully and the boot, or leave it on your charger then boot up.
Entering Service Diagnostics without Rebooting the Printer:
This method of entering diagnostics is to allow customers to be diverted to service
diagnostics in order to perform some tests.
1. Display the Hidden Service Menu as described in "Hidden Service Menu" on
2. Scroll down to Enter Diagnostics and press the OK button.
Entering Service Diagnostics by Rebooting the Printer (8400):
1. Turn the printer power OFF.
2. Press and hold the Back and Help buttons.
3. Turn the printer power ON while continuing to hold the Back and Help buttons
for approximately 30 seconds until the Control Panel indicates Diagnostic
Entering Service Diagnostics by Rebooting the Printer (8500/8550):
1. Turn the printer power ON.
2. Wait for the Xerox logo to begin moving across the display.
3. Before the logo is centered on the display (stops moving), press and hold the
Back and Help buttons on the Control Panel.
4. Hold both buttons until the display reads Beginning Service Mode
Initialization. Release the buttons and the printer reboots into service mode
with the Service Diagnostics menu displayed.