Entries in tristar (3)

Sunday
Aug202017

iPhone won't charge after using a mini fan

 It's summer and its hot! As most of us find ways to beat the heat and cool down, this often lands us to searches on the internet. One ponders It's 2017, there must be a way to use my iPhone to cool myself down!?

 

Some have stumbled upon a portable mini lightning fan for iPhone as shown below

 

iPhone mini fan

  • For most Apple iPhone users alike this fan that plugs into the bottom of your phone and cools you down almost anywhere might seem like a great idea, but it has a hidden problem. 

These small portable mini lightning port fans cause charging problems on the iPhones.

 

 

Take a look at some of the comments made from users of the product:

 

"My sister bought this mini fan $ 1 that plugs into the port of loading of your iPhone and the fan uses the iPhone's battery to do the fan moving.  Today I plugged my iPhone with the fan and the fan started spinning and then all of a sudden it just stopped, my sister was in the room and said "Oh that happened when I used it and now my phone won't load" so I went and tried to plug it into a wall charger and it would not load the only way that load right now is in having plugged into the computer. "

 

"bought 2 of these and both of them caused both of my phones to stop charging. The fan didn't work and as soon as I plugged my charger up it wouldn't charge."

 

"Fan no longer works with iOS10 release. It causes the phone to become completely unresponsive until you unplug it. I've also had it 'restart' my iPhone 6S Plus on occasion as well.

(+): It's a conversation piece, no noticeable battery drain, somewhat works for the price

(-): Doesn't work with most phone cases (similar to aftermarket Lightning cables), lower half of the phone is unusable because the blades cover it, fan speed varies, probably due to a poor connection and/or unbalanced blades.

Overall, for cost, you can't expect much. It works, just not well. I don't see how anyone could find this practical. I thought I'd use this on our trip to Disneyworld, but it was not worth the hassle."

 

 

As we've found out from our recent post about iPhones charging and the Tristar charging ic chip that can go bad.

 

When the fan is plugged into the lightning port it will typically spin for about 30 seconds to 1 min. Once the fan stops spinning the user will usually remove the fan by unplugging it then re-inserting it  back into the device.

What the user is not aware of is that throughout the process of the fan drawing current from the battery, it also provides a feedback loop into the charging circuit causing the tristar charging ic to get ruined.

iPhone Tristar IC

As most users might worry the phone needs to be plugged into itunes to fix the phone, this unfortunately will do no good. Once the charging ic has been damaged you may expierence issues such as:

  • Not charging
  • "Fake Charging"
  • Not turning on
  • Boot-Looping
  • iTunes not recognizing iPhone

 

Fortunately for all of our customers the phone is not ruined! It simply needs a new tristar charging ic chip installed which involves micro soldering.

 

 

All iPhones have a charging ic known as the tristar which means all phones will be affected by this problem. But luckily this means the repair process is the same for each model, even if you have an iPhone 5S, iPhone 6, iPhone 6S or even iPhone 7.

 

 We are able to perform these repairs within 2-3 business days. Nothing on the phone will be deleted and it will function normally after the repair. We would however check to make sure this is the problem before performing the repair.

 

Burlington, Vermont U2 Tristar Repair Service

Give us a call today!

(802)448-0403

 

To get your device repaired simply create a ticket on our site and mail it into us for repair via our page.

 

iPhone Tristar IC Mail-in Repair Service.

Friday
Jun092017

iPhone not charging when plugged in? 

Once you're certain that it's not an issue with the outlet, charging block or cord— and the phone still isn't charging, then the problem can be reduced down to a few different options: a bad battery, charging port, or tristar. 

Any knowledgable electronics repair shop should be able to pretty quickly determine the source of the issue by observing if the phone draws any current with an ammeter, dryfitting a new charging port and new battery, and observing the response through the ammeter. 

A bad tristar might still result in the phone drawing current, but won't allow the battery to charge. To be certain, a known working battery might be dryfit onto the phone and if the phone still won't charge the new battery, then a tristar repair is indicated.

 

So what is a tristar?

A tristar is a chip (1610A3) on the motherboard that recognizes if the phone is plugged in, and addtionally determines if the battery is safe to charge or not. The tristar interfaces with the baseband and functionality of the chip can be definitely tested by using a digital multimeter on the battery terminal to see what voltage the terminal is carrying when the phone is plugged in. With a working tristar, the terminal might be carrying 3.6-4.2v, but a bad tristar will be indicated by 2v or less at the terminal.

What causes a tristar to go bad?

Typically, charging your iPhone using a third party charger or lightning cable that is not Apple MFI certified allows for larger variables in voltage and current, this then damages the tristar chip and can leave you with a seemingly dead/not charging iPhone. Lightning cables actually have a chip in them that regulate the voltage and current being pushed through into the charging port.

Another common reason for this is also charging your iPhone from the cigarette lighter of your car. This does not regulate the voltage as well as the original AC adapter, since alternatively the power is coming from the alternator. If you need to charge your iPhone or any electrical equipment in your car we would recommend a good quality inverter with your original charger and Apple lightning cable.

Fortunately for you, microsoldering techs at Wires Computing do this repair daily with essentially a 99% rate of successful repair. Send yours in today.

Friday
Jan202017

iPhone battery symbol not charging

 Plauged with an iPhone 5, iPhone 6, or 6S that does not charge even after a battery replacement and/or a new charger port install?

 

This may be the result of a charging ic on the motherboard typically referred to as the U2 or tristar.

This issue is normally caused by using cheaper third party charger that does not regulate the voltage and as such spikes in the voltage will ruin the charging integrated circuit.

 

Charging your iPhone using a third party charger or USB lead that does not regulate this as much allows for larger variables in voltage and current, this then damages the U2 IC and can leave you with a seemingly dead iPhone. Another common reason for this is also charging your iPhone from the cigarette lighter of your car. This does not regulate the voltage as well as the original AC adapter as the power is coming from the alternator. If you need to charge our iPhone or any electrical equipment in your car we would recommend a good quality inverter with your original charger and USB lead.

 

Having a phone that won’t charge or turn on is one thing, but knowing that there’s a chip inside that’s damaged and preventing it from turning on is an entirely different frustration. But, knowing is half the battle, both when it comes to the cables being used and the steps needed to fix it. Did you ever suffer from an iPhone  that wouldn’t turn on, or charge over 1%?

 

  • Take a look at Micro Soldering Repair's write-up about this issue:

iPhone Tristar Replacement