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Category:  Laptop Repair and Service  Contents of this article  How to measure the AC adapter How to check the backup battery   How to check the battery pack Lenovo  ThinkPad - L 450 Power system checkout To verify a symptom, do the following: 1. Turn off the computer. 2. Remove the battery pack. 3. Connect the ac adapter. 4. Check that power is supplied when you turn on the computer. 5. Turn off the computer. 6. Disconnect the ac adapter and install the charged battery pack. 7. Check that the battery pack supplies power when you turn on the computer. If you suspect a power problem, see the appropriate one of the following power supply checkouts: “Checking the AC adapter” “Checking operational charging” “Checking the battery pack” “Checking the backup battery” You are here because the computer fails only when the AC adapter is used. # If the power problem occurs only when the ThinkPad Essential Port Replicator is used...

How to Enter the Factory Mode 1. Confirm that the MENU can be displayed. 2. Close the MENU. 3. Press the keys in the following order : [ENTER] >  [ENTER] > [LEFT ARROW] > [ENTER]. The message [Do you want to enter the Factory Mode? Yes : UP No : DOWN] appears. Select [Yes :UP ]. [Supplementary information: How to Exit the Factory Mode] Perform the step 3 KEY operation. The message [Do you want to return to the User Mode? Yes : UP No : DOWN] appears. Select [Yes : UP ] V COM Adjustment 1. Connect the VG to the INPUT-A connector. Connect the FLAT FIELD 100 IRE signal to the input connector. Leave this unit with POWER ON for 10 minutes or longer for aging. 2. Enter the Factory Mode. Enter the Device Adjust MENU, and then enter the Panel Drive Adjustment MENU. 3. Connect the XGA, R-single color, 30 IRE, single-line ON/OFF signal to the input connector. 4. Enter the P. DRV Adjustment MENU, and then enter the VCOM R Adjustment screen. 5. Adjust the VCOM R value for minimum...

Spirit XE 100 - XE 200 - XE 300 - XE 400 - XE 500 Engineering Mode 1. Press and hold the START, ENTER, and STOP buttons until display beeps. 2. “ENGINEERING MODE” will scroll across the screen, press ENTER. 3. Press the UP and/or DOWN buttons to scroll through the following sub menus: Key Test Display Test Functions Security Factory Set Exit 4. Press ENTER to access the desired program. 5. Press STOP to exit Engineering Mode. Key Test Press ENTER. Press all buttons on console. Display Test Press ENTER. Console will test each segment or LED. Look to see if there are any burned out or not working. Functions Sleep Mode On/Off --------------------- Press ENTER to turn on or off. Pause Mode On/Off -------------------- Press ENTER to turn on or off. Odometer Reset ------------------------- Press ENTER to reset. Units English/Metric -------------------- Press ENTER to change. Beep Sound On/Off --------------------- Press ENTER to turn on or off. Motor Test-------------------------------- ...

Category: Mobiles and Smartphones Repair and Service   Contents of this article  How to remove the case  How to dismantle the battery  How to replace the USB port Nokia N 900 Turn the phone over so the screen is face down. Remove the back cover by locating the slit on the bottom of the phone and lifting up. Remove the battery by lifting it out of the device. Remove the two "L-shaped" antennas by unscrewing the following screws: Four screw M1 .4x5.0 Two screw RF1 .4x4 In addition to unscrewing the screws, remove the B-Cover (which will fall right out without the screws). You will now have two halves of the phone. Grab the half of the phone that has the keyboard on it Remove the keyboard by unsnapping the frame and then lifting the pad out from the device. Place the key pad and cover to the side for the remaining steps. Use a blue plastic opening tool lift the motherboard out of the back cover Look at the bottom of the motherboard to find the  ...

Category: Mobiles and Smartphones Repair and Service   Contents of this  article  How to remove the case  How to remove the battery  How to replace the Mother board  Samsung Galaxy S 4 MOTHER BOARD REPLACEMENT PROCEDURE  Pry with a plastic opening tool, or your fingernail, in the divot to the left of the rear-facing camera, near the power button. Lift the rear case by the corner nearest the divot and remove it from the phone. Use the flat end of a spudger, or your fingernail, to press the microSD card slightly deeper into its slot until you hear a click. After the click, release the card and it will pop out of its slot. Remove the microSD card. For reassembly, push the microSD card into the slot until it clicks in place. Insert a plastic opening tool, or your finger, into the notch of the battery compartment and lift the battery upward. Remove the battery from your phone. Use a plastic opening tool, or your fingernail, to press the SIM c...

Category: Home Appliances Repair and Service   Contents of this article  2 Digit Error codesa and causes  4 Digit Error codes and causes How to solve the problem  KitchenAid  Home appliances Error Code Causes  and Solutions - 2 Digit  F0 Causes Control Board Failure Solution Replace control board (clock). F1 Causes Control Board Failure Solution Replace control board (clock). F2 Causes Oven Temperature Is Too High Solution Check for welded contacts on bake and broil relays. If present, replace control board (clock). For SELF CLEAN models, check door lock operation. Check sensor, sensor harness, and the sensor harness connection at sensor and oven control. Also check for any causes of high resistance in the oven temperature sensor circuit. Remember: The oven control board (clock) measures resistance of sensor circuit, not actual oven temperature. F3 Causes Open Oven Temperature Sensor (RTD) Solution Replace oven temperature sensor (RTD). F4...