Nokia E71 line water problem, my Nokia E72 parallel goods problem

It shows that the mobile phone is some Asia-Pacific version or European version without Chinese, so updating the phone with Nokia's official PC suite will appear without Chinese!

Go to the mobile phone menu under setting-general-personalisation-language to see if there is a Chinese Simplified option, if not, the code when flashing the machine is wrong!

You go through it first, if you can't solve it, you can only flash the machine.

No mobile phone signal 1: The mobile phone has no signal and cannot be called**. First, use manual search to see if you can receive the network (China Mobile or China Unicom), if you receive it, check the transmitting part of the circuit, if you can't receive it, check the receiving circuit.

No signal on the mobile phone 2: No signal on the mobile phone: look at the boot current, if the current beats very slowly (about two seconds or more), it is generally a problem with the RF circuit, focusing on checking VCO, AFC, RI Q, etc.

No signal on the mobile phone 3: No signal on the mobile phone: look at the boot current, if the current does not beat much, focus on checking whether the IQ signal at the receiving part is normal.

No signal on the mobile phone 4: No signal on the mobile phone: look at the boot current, if the current does not beat, focus on checking the CPU and software.

Signal from time to time 1: signal from time to time: see if there is a signal to play **, if it can be played is generally not good reception or transmission performance, focus on checking the antenna contacts and antenna switches.

Signal comes and goes 2: The signal comes and goes: see if you can hit ** when there is a signal, if the signal falls down as soon as you hit **, there is generally a problem with the transmission part. Focus on checking power amplifiers, antenna switches, VCOs, etc.

Signal comes and goes 3: The signal comes and goes: see if you can play when there is a signal, if you can't play and the signal will not fall, in front of the domestic machine or parallel goods (South Korea) machine, many are software problems, but there are also power amplifier bad, you can remove the power amplifier and try the flying line.

Signal intermittent 4: Signal intermittent and unzen or: parallel (Korean) aircraft and domestic aircraft to see the reaction of the display screen, most of the "Call Failure" is the transmission part or soft congratulatory part of the piece of the problem, it is possible to rewrite the code part of the information before making the next judgment.

Some people may not say that the mobile phone may not be scrapped if it gets into the water, and it may not be able to turn it on, which depends on the situation of the water.

If you get the phone, even if it is running water, as long as the screen is on, it proves that there is no problem, as for the start-up burned, this and that, not absolutely.

The method is relatively simple, first disassemble, fold to the smallest unit, as for the can not be folded, start to treat all the water that can be seen, and then it is invisible water, just not let the mobile phone swim in the water, at this time, there is very little water left on the circuit board, at this time, don't use any hair dryer, don't use any ultrasonic cleaning machine, use a fan, a fan with a very large air volume, the kind of fan with an air volume that is at least ten times larger than the household hair dryer, dozens of pieces, and then fix the circuit board and start blowingAs for the layer holes on the PCB substrate, we won't say that the hole can not enter the water, because your mobile phone, the hole is small and the same as JJ, and the water cannot be evenly covered on the circuit board, and the principle of not covering is very simple, needless to say.

All of them must be dried for a long time, and no hair dryer can be used, because one is that the air volume is not large, and the other is that the temperature is high, which accelerates oxidation. About twenty minutes.

The most difficult thing to deal with is the screen. If the water ingress is very serious, there will be water between the screen layers, so you don't have to worry about it, and it will dry automatically in about three days.

This method has dealt with countless mobile phones that have fallen into the water, and all of them are normal.

The so-called start-up burning plate is the burning plate caused by too many conductive impurities in the water, if the water quality is clean and the electrolyte is average, it will not burn the plate. So the so-called spending hundreds of dollars, ultrasound, alcohol, and clean water will only make the phone die faster.

The landlord has money and no money, so if he has money, he throws it away and buys it again, and if he has no money, he will send it for repair.

Four steps to rescue.

Rescue Step 4] Rescue Step 1: After rescuing the phone from the water first, remove the battery as quickly as possible.

Rescue Step 2: Take out the SIM card of the phone, shake the water in the phone vigorously or absorb it with a paper towel.

Rescue Step 3: Find a hair dryer and blow it with cold air for an hour or two, then blow it with an electric fan for a day and a night, and then put it in a ventilated and dry place for a day and a night (a bit of an exaggeration, this is suitable for falling into the water and soaking in the oil for a long time)! If neither of these works works, just put it in a ventilated and dry place to dry it, and turn it on after three days.

If you have a disassembly tool at hand, it is best to disassemble the phone, and the time required can be reduced by about half.

Rescue Step 4: Generally speaking, if you don't soak in water for too long, the above three steps can basically be done. If it still doesn't work, it may be that the motherboard is broken, and it should be sent to the repair station as soon as possible to deal with it.

Rescue the four taboos] Rescue the first taboo: Don't use the hot air of the hair dryer (note that you can't use hot air, it's okay to be cold!) Or exposure to the sun, which can easily cause the circuit board to deform.

Rescue the second taboo: You can't press the shutdown button to turn off, because as soon as you press the shutdown button, the mobile phone will be powered on, and a short circuit is likely to occur, which is easy to cause damage to the mobile phone motherboard. (That's what I'm emphasizing!!) It's critical! ）

Rescue the third taboo: Don't boot the test too often. Wait at least 24 hours before installing the battery and turning it on to see how it goes. (This is very important, the more anxious you are, the more useless it is!) ）

Rescue the fourth taboo: Do not move any keys of the mobile phone before drying to prevent short circuit damage to the mobile phone.

Never turn it on, take out the battery, and dry it with a hair dryer

Pull out the battery, and then put the phone in the rice for a day, and it should be fine.

My phone was also once left in the pool by my son. Here's how I deal with it, quickly take out the phone, take out the battery and the phone card. Then throw the water out, put the phone and battery on the balcony for about five days, and after five days, put the phone card and battery on, and you can use it.