Nokia X7-00 Memory Card Not Detected Problem Solution

Here's the Solution for Nokia X7-00 memory card not detected problem. Locate the highlighted components and begin checking it out. Do trace each of the connection line paths, start on the VMEM then down to each corresponding MMC slot pins connection.

Nokia X7-00 MMC not detected repair guide
View the larger image here.

Nokia X7-00 Insert SIM Card Problem Jumper Ways Solution

This solution might help you to fix Nokia X7-00 with "Insert SIM card error" problem. If the phone doesn't recognize any SIM card inserted to it this might be your guide on how to solved and mend the issue.

You may start by checking the SIM card pin connector for possible damaged or lifted. Check if it needs a  re-soldering or just cleaning. The colored line paths represents each of the corresponding SIM card connector pins, just do trace each of them carefully then mend to reconnect if somehow there is open or cut connections. Check each of connected capacitors , replace if already damaged.

View the larger Nokia X7-00 Insert SIM Card Solution here.

If the solution above doesn't fix the problem, then the trouble might possibly lies on the Gazoo (ASIC) chip.
Reworking it might only fix the said nnsert SIM card problem on Nokia X7-00.

Nokia X7-00 Display Problem Solution

Here's a troubleshooting hints for Nokia X7-00 LCD Display problem such as blank display or no display at all and otherwise a corrupted or garbled display. This solution may help you for easy repair procedures.

Note: This only works if you can still hear something on the phone like tones, incoming alerts and not on a white screen problem or hang up on white screen situation.

The quick step to fix display problem, is that you have to verify a working LCD, just replace the LCD screen module at once just to ensure that the LCD is working or not and then proceed to hardware troubleshooting after confirming that the LCD is still fine. Just locate the highlighted components shows on figure solution picture below and do have a careful check up on each one of them one by one.

 - Check the display pin connector, clean it, rework or re-solder it if necessary.
- Check the capacitors and coils, replace if necessary, and then check the VBAT voltage and the VIO voltage on it. Those are the supply voltages for the display
- Check the two DSI line choke filters
- If those parts above already checked and seems nothing wrong, the problem possibly exist on the Display UI chip. Reworking or replacing it will only fix the display problem

For damaged or lifted display pin connector or due to wet or water damaged, here's the tracing guide if you might think that the problem lies on a broken display signal line paths.

So, hope this helps you in fixing display problem on Nokia X7-00

Nokia X7-00 Not Charging Problem Solution

Here's the Nokia X7-00 Solution for Not Charging Problem on the USB pin connector. This may help if the phone suffered wet damaged and resulted to no charging indication when the wall charger is plug-in.

Before proceeding, ensure that the battery and the battery charger are in good working condition.
- Check all the components shown on the image below, you may start by checking the USB pin connector.
- Then the fuse, diode, capacitors and filter coil for possible open or short circuit.
- Trace each of the connection line paths from USB pins down to the components where it is directly connected.

 view larger image here

Now, if happens if the above parts were already been checked and seems all were okay, the next step is to determine if the battery sense resistor is working fine. see the image below.
You can check around 5V across on the R2200 resistor when the charger is plug-in. That resistor has a 10mOhms, you may replace it if found damaged.

view larger image here

The final option is working on the EM-IC (Power IC) if the above procedures doesn't solved the charging problem. You may try to rework first the ASIC chip, then replace if necessary and or after reworking on it doesn't still fix the problem.

Nokia X7-00 shows 'Charger Not Supported' error repair solution

Here's the guide on how to fix the Nokia X7-00 that shows "Charger not supported" error when the battery charger is being plug-in. This solution below shows the so-called BTEMP 47K resistor in Nokia X7-00 devices that mostly known by technicians that if being damaged will result to Charger Not Supported problem. This is another not charging problem issues but with a different method on how to fix it.

You can view the larger image here. Just locate that component mounted at the side of the PCB board and replace it. Some problems may also cause by a battery connector, so ensure that the battery terminal are also okay, before attempting to replace it.

Nokia X7-00 Handsfree Speaker No Audio Problem Solution

Here's the solution for Nokia X7-00 in fixing handsfree speaker no audio problem. The Nokia X7-00 has two handsfree speakers located at the bottom left and right corners of the device. If something went wrong like if there is no sounds can be heard if the handsfree or loudspeaker is being activated, this solution might help for your repair.

Hints in troubleshooting Nokia X7-00 not working handsfree speaker problem.
You may start by manually checking the two speakers using a multimeter tester.
Check the filter coils, for possible damaged, clean the surroundings including the speaker terminal pads if oxidized found.
Trace the connection line paths between the speaker terminal pads to each filter coils where it is being connected.

If the first attempt of those methods above doesn't fix the speaker audio problem. The next option is to work on the Audio Codec IC. You may check the VBAT 3.7v across the filter inductor coil, this is the supply voltage to make the Audio IC work.  If the voltage is okay, check all the surrounding components of the Audio chip.

 Rework the Audio Codec IC and then replace if necessary. However, if the problem still exists, there are two options which can be suspected as became faulty - its either the ASIC (Power IC) or the CPU. But working this chips needs a great soldering skills, so if you don't have guts to do it, just ask an assistance to your head technician on duty.