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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

If ever encountered a nokia 6700 that always display insert SIM card on the display even trying inserting a good and working SIM card but still won't accept any SIM card, this solution may possibly fix the problem.

Nokia 6700 classic insert SIM card problem solution

Repair hints:
a) Ensure that the SIM card socket, slot or holder pins are cleaned and free from dust and oxidation.
b) Trace and check the VSIM voltage, it reads about 1.8 to 2.8 volts on components showed on the solution above.
c) IF the SIM voltage is okay, you may need to remove and rework the GAZOO chip for further trouble shooting.
Warning: handling the GAZOO chip may need extra expertise or you may end up  a dead phone. Don't touch it if no adequate knowledge about this chip.

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

This solution covers for Nokia 6700 classic Backlight LED not working on the LCD screen display that result to a dark or black screen LCD display.
You may first try to install a new LCD screen module before applying or using this solution below.

Nokia 6700 classic LCD Screen Display No Backlight LED Solution

If the LCD screen is already tried installing a new one but still the backlight LED still not working or unable to light up. You may then need to trace, check and or replace the components showed on the solution above.
There is a BVAT voltage line that supplies to the LED driver IC and you can check this voltage about 3.7 volts which is came from the battery  positive terminal. and came way across to the two filter coils before it feeds in to the LED driver IC.

If the the voltage supply line is okay, remove the LED driver IC and trace each corresponding solder ball terminal line paths through to the pin connector and VBAT voltage line filter coils.
Rework and clean the solder ball terminal pads.
Replace the LED driver chip if the problem unsolved.

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

Here's the solution for Nokia 6700 classic Ringer, hands free speaker no audio sound problem.
This solution may help fix if the speaker is working okay and or already tried installed a new replacement spare speaker.

Nokia 6700 classic Ringer, Hands Free Speaker Failure Solution

If the ringer speaker is okay and the speaker terminal pads is already cleaned but still there is no sounds can be heard on it, you may need to check and or replace the components showed on the solution above. This components  were composed of a 0 ohms resistors and filter capacitors.

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

Here's a solution for nokia N78 ringer and hands free speaker not working or no sounds can be heard on it. This solution shows the left and right speaker circuit components connections.

Nokia N78 Ringer and Hands Free speaker No audio sounds solution

There is an audio amplifier IC that drives and boosts the audio signals before it goes trough to the left and right speakers. The audio data  signal is filtered by filter coils and an input capacitors.

Repair hints:
1. Check and ensure that the speaker is working okay, a saturated sound output is caused by a damaged speaker, replace it with a new one.
2. Clean the speaker terminal contact pads, make sure it is free from dust, corrosion and oxidation.
3. Check or replace the filter capacitors and filter coils.
4. For the right channel speaker not working, see to it that UI flex cable is not damaged, replace it as well if damaged. If the UI flex cable is okay, check both filter coils and capacitors.
5. If the both speakers,filter coils and capacitors is okay, try to rework the audio amplifier IC or replace if the problem still exists. Don't forget to rest assured that the line connection paths is well okay and not open or cut, check and trace it as well also. Good luck!

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

Here's the solution for Nokia N97 touch screen doesn't work or respond problem. This solution may works if already tried to restore, flashed, upgraded or updated the device firmware and also tried to install a new replacement touch screen module but the touch screen still won't work.


The solution below shows the location of certain components that need to check or replace if the touch screen of Nokia N97 stop to respond or not working.

Nokia N97 Touch Screen Not Working Repair Solution

There is an ESD filter IC is being used on the touch screen control circuit, located beside the LCD pin connector. You may check this filter IC and replace if found damaged.
If the Filter IC already replaced but the problem still exists, you may proceed to rework the IO expander IC, the IO expander IC also controls the keypad keys. If both keypads and touch screen won't work you may suspect that this chip is faulty or damaged.

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

Here's a solution for Nokia N97 display problem hardware related issues that can't be fix by means of  software.
This solution may possibly help fix and repair Nokia N97 LCD screen display problems such as white screen, blue screen, blank or black screen, garbled or saturated screen displays.



If already tried to restore or flash the device firmware and or already tried installing  a new replacement LCD screen module you may need to check the components showed on the solution below.

Nokia N97 Display problem - hardware repair

There is a Display EMI filter mounted besides the LCD pin connector, you may check and trace the line paths from the pin connector before replacing a new replacement spare IC.
If the Display filter IC seems working or been replaced but the problem still exists you may proceed to rework or replace the Display Controller IC.

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- The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5. of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about , on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

Here's the jumper solution for Nokia N97 damaged or lifted USB pin connector terminal pads on the PCB. This solution shows the alternative jumper ways to solve the problem.

Nokia N97 damaged charging pin jumper ways- charging problem solution

 Note: components mounting configuration may differ from original PCB Board
If the solder pads is lifted you may apply jumper to corresponding components shown at the solution above.