♪ today's headlines begin ♪
The phone was suddenly black-screened, unable to turn on the machine, charged hot, and the maintenance shop said, “the main plate is burned, let's change the new phone”, and many people were panicking on the spot — either by spending a lot of money on the main panel or by simply changing the new machine. But you probably don't know that the main board burned off the phone, which is often a maintenance shop set-up or a more economical solution。
As a digital maintenance operator who has been exposed to hundreds of malfunctions, today you can speak out about three maintenance colds that are not easy to say in the industry, so that you can save your mobile phones at a critical time。
First, let's get this straight: "the main board is burned." what does that mean
Many people have heard that the first reaction to the "master board burned" was "the whole cell phone is dead," which is the biggest misunderstanding。
The main panel of the cell phone is a circuit board that combines core components such as cpu, memory, power chips, and base belts, and is called “burned”, which is essentially a short road, burning of one or more elements, not the entire plate. For example:
- unstable voltage when charged, possibly only power management chips burned
- failure to process water in time, possibly only corrosive of the base tape or audio module
- overheating due to play on the side, which may have burned only small pieces near the charging interface。
The logic of formal maintenance is “where is broken and where is fixed” rather than simply changing the whole panel. But a number of non-formal maintenance stores deliberately exaggerate the failure by referring to “some chip is broken” as “the whole board burned down” in order to make you either buy the main plate at a high price or buy a new machine, so they make more money。
So, next time you hear about the main board burning, don't give up, just ask: which part is broken? Is there a possibility of repair
Two or three maintenance colds to avoid 90% of the pits
Not all main board faults need to change the main board
This is the core of cold knowledge: 90 per cent of the master plate failure can be addressed through “chip-level maintenance” without the whole change。
What's a chip level maintenance? It is to locate specifically damaged chips with specialized equipment (e. G. Power, ic, base-band chips, charging ic), then to remove the bad chips through a heat wind rifle and weld new homotype chips. The cost of this type of maintenance is one fifth or even one tenth of the entire board。
To give one of the most common examples: mobile phones are not charged, the machine is re-opened indefinitely, and the maintenance shop says, “the main plate is burned and the switchboard is 2,000 bucks”. But it could actually be a short-circuit charge of ic, and the cost of one charge of ic would be a few dozen dollars, plus manual fees, and it could be fixed at a maximum of two or three hundred。
For example, the absence of a signal when a cell phone enters the water may not be the total destruction of the base belt module, but the erosion of the electrical caps around the base belt, and the cleaning + replacement of a few small caps can be solved by dozens of pieces。
Hole avoidance alert:
- the formal maintenance shop will give you “failure detection” and locate specific components with a universal watch, a oscillator, to tell you “it's a broken xx chip and xx money for maintenance”
- a shop that says, "the main board is burned, the board has to be changed" probably wants to fuck you up and go straight to another one
- chip-level maintenance is highly technical, and it is important to find a door shop with specialized equipment that can provide maintenance video to avoid being “replaced without repair”。
Water-in-theatre and drying can save 80% of the malfunctions
When many people get their phones in the water, the first reaction is to press the power button to see if they can turn it on, or use the wind blower to blow and tan the sun -- which is the most lethal operation。
When water enters the cell phone, there will be residual moisture and electrolyte within the cell phone, and if it is turned on, the current will lead directly to short-circuit burning of the component; and high-temperature drying will allow water to penetrate deeper into the chip layer and exacerbate the corrosion。
The correct steps are:
1. Immediate power outages: to remove batteries directly, to force long, undisable power buttons to shut down and never to press any more keys
Drying of surface moisture: drying of the surface of the mobile phone with paper towels, towels, water at the interface, not dumping of the cell phone and avoiding water diversion into the interior
3. Specialized cleaning: first-time delivery to a maintenance shop, clean-up of internal moisture and electrolytics with waterless alcohol plus ultrasound washing machines。
According to maintenance data, 80 per cent of mobile phones sent for repair within one hour of water entry can be repaired by cleaning + drying, without the need to change any component; if they are processed more than 24 hours later, corrosion will spread and maintenance costs will at least triple。
Hole avoidance alert:
- do not use rice and drying agents to “lay cell phones”, which can only suck out surface moisture and the water in the internal cracks will not come out at all, but will take time
- do not charge the water, not the computer, or trigger short circuits directly
- the formal maintenance shop will perform “water wash” at a cost of between $50 and $100, before the component damage is detected。
After the official sale, “unable to repair”, a third-party professional store may be saved
A lot of people went to the official market first after the trouble, but you probably didn't know that the maintenance logic after the official sale was to “just change and not fix”, especially the insured type。
For example, your iphone has failed the main plate, and the official sale offers you two options: either to switch the “official switch” (which is actually a refurbisher) at a high price, or to go straight to the end; and, after the official android sale, it is mostly a direct switch to the main plate, often at a price of half or more。
However, the third-party professional repair shop, which uses “chip-level maintenance”, can solve many of the official sales failures that say “can't be repaired”. For example:
- re-launching, black screens due to the fallout of the apple a series of cpus, which can only be replaced by the official machine and can be repaired by a third party through “replanting of cpus”
- the base belt failure of the anzor flagship, with an official change of thousands, and the possibility for third parties to replace the baseband chip separately
- small problems with screen wiring, main panel interfaces, which are officially classified as “master plate failure” and can be repaired by a third party of dozens。
Hole avoidance alert:
- to find a third-party maintenance shop, which must look at “qualifications”: whether there are professional maintenance workshops, microscopes, hot wind guns, and whether there is a comparative video before and after maintenance
- precise the question of “maintenance quality assurance”: regular shops will provide quality assurance for a period of three to six months, which cannot be repaired without charge
- do not look for a “roadside shop”, which is often not technically closed, has been repaired for several days and may have replaced your original parts。
Three things you have to do before you repair it
First, do a “free test” and don't come up and pay
The formal maintenance shop provides free failure detection and gives you the specific failure points and maintenance offers without you paying first. If one of the shops says “to pay the test fee first”, go straight ahead, which is a typical set。
At the test, you can keep an eye on the maintenance master so he can show you which chip is broken and avoid being misreported。
Compare the three quotations and do not be fooled by “low prices”
Many maintenance stores attract you at a low price of 50 for the main plate, 100 for the screen, and when you leave your cell phone, you'll be told, "there are other failures, more money," and the total price will increase several times。
The correct course of action is to describe the failure clearly, and to ask the quotations of the three stores for comparison before selection. For example, it is also “characterized ic damage”, 200 newspapers and 500 newspapers, with a high probability that 200 newspapers will be regular stores and 500 newspapers will be in pitheads。
Key data to be backed up and not to be “poached” by maintenance stores
Important data, such as photographs, chat records, payment information, etc., are to be backed up in advance on the phone, whether it is to repair the main panel or change the screen. If the cell phone is not working, then the maintenance master can also help you with the data and then the maintenance。
In addition, maintenance efforts are made to keep an eye on the master's operations, to avoid being replaced with spare parts such as batteries, cameras, screens, etc., and to perform on-site inspections after completion of the repairs, confirming that the functionality is normal and then paying for them。
Iv. Final reminder: when should mobile phones be changed rather than repaired
Not all of the malfunctions are worth repairing
1. Maintenance costs exceed 30 per cent of the new machine: for example, for a three-year-old kyat machine, the main plate would cost $1,000, rather than simply adding money for a new one
2. Repeated damage to core components: for example, the cpu welding and repairing indicates that the main plate itself is ageing and that repairing is a waste of money
3. The aircraft are too old to be of maintenance value: for example, five years ago, the spare parts were out of production and, if repaired, other problems would arise shortly。
In general, “the main board burned” is not really a cell phone death sentence. As long as you know these maintenance colds, you can avoid most of the circuits and fix your mobile phones with the minimum amount of money, without rushing to change machines。
