Check your sim card with other mobile to find whether it is a problem of network or your mobile. If it is with Sim card, you can change it, or if it is mobile then the problem might be with the antenna.
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The cam sensor outputs voltage pulses when the engine is running. The sensor is powered by the engine's computer, which typically provides 5VDC to power the sensor. With the engine not running, turn on the ignition switch. A cam sensor has three connections: Power (5VDC), signal output (% or 0 VDC varies with cam position), and ground return. Measure the signal voltage from the cam sensor wiuth repsect to ground. If it is 5V, slightly turn the engine's crank with a wrench until the cam sensor signal drops to zero volts. You should be able to see the signal voiltage switch between 5V and 0V while turning the crank slowly. If so, the sensor is working properly. If the signal doesn't change, the sensor is likely defective and should be replaced. They do fail.
There are a few things thatcan cause you to lose wireless connection with your wireless router.1. Weak signal strength,check the signal strength on your wireless card. If it is weak move thewireless router away from brick or concrete walls and if possible locatethe wireless router higher up.2. Have you secured yourwireless router from people near your from unauthorized access? i.e. change thedefault password, setup encryption use WPA2 or WPA, change the default SSID,and turn off SSID broadcast, and for added protection, enable MAC addressfiltering which allows only the MAC address/es of your wireless card/s toconnect to your wireless router.3. You could be gettinginterference from electrical sources such as air conditioners, arc welders,washing machines etc. If so, the power supply to the wireless routers andcomputers etc should be connected to a surge protection power board, betterstill connect your computer equipment to an UPS (Uninterrupted PowerSupply). 4. Check the channels ofthe wireless routers and access points in your area and change the broadcastchannel on your wireless router to an unused channel or one that is currentlyused but has the weakest signal strength. This will minimize interferencewith your wireless router from other wireless routers and accesspoints in your area.
if you recently accidentally drop your phone then you need to open it and reheat the cobba i.c or known as the audio i.c for some cellphone experts. you need to have the following things. hot air and a flux. first you need to put on a flux above the audio or cobba ic and reheat it using the hot air. set the hot air to its proper setting and slowly reheat the audio ic for 2 to 3 minutes. and then let it cool for 3 to 4 minutes and then close back your phone. then for sure it gonna have a signal.be careful of reheating the audio or cobba ic. since its sensitive and don't try to move it, just reheat it. coz if incase you move it, it will cause you phone to recieve a contact service error.
Try this first
1. try to cover up any part of your phone with your bare hands. Look for a spot where the phone signal gets weaker if you cover a particular area. If that is the case, then you simply need to hold the cellphone in another position.2.Second, try to change your position or location. There are many factors that affect cellphone signal strength, one of them is the space. If you are inside a closed location, go out and see any improvements in the signal.3.Third, you can try to detach the SIM card from your phone and turn it off. After 5 minutes, put it back and see if the phone no signal problem is still going on. Or, you can change your SIM card if you have a spare one with another network say Verizon, Smart or At &t.If all these cellphone no signal tricks won't work, then your phone is probably broken. Bring it to a nearest cellphone repair center.
To fix the problem try pressing the pound sign in your keypad and press call. Allow the system to look for a signal for at least 3 to 5 minutes or until a signal is displayed. If the problem still persist, you have to open your cellphone and check the connection between the antenna terminal and the board.
In this order: 1) Turn off all PCs and printers connected to the router. 2) Unplug your router's power cord. 3) Unplug your modem's power cord. 4) Wait for at least 2-3 minutes. 5) Connect the modem's power cord and wait for at least 2-3 minutes. 6) Connect the router's power cord wait for at least 2-3 minutes. 7) Turn on each PC separately and wait until it is completely finished booting before turning on the next PC.
If you still do not have connectivity, read the manual and change the channel of the modem. YOu may be experiencing some RF interference, ie microwave, wireless phone system etc...