InkBook Classic Reader Won't Turn On: No Response to Reset, Green LED On - Need Advice

Question

Hi,

I have such a problem that my InkBook Classic reader just won't turn on. When I connect it to the power supply - the green LED lights up and the screen changes as if the reader is turning on (but without the charging icon). No connection to an external power supply - no reaction. Likewise, no response to the reset.

Any advice?

gradek83 · Accepted Answer

If the battery has not been used for a long time, the battery may have discharged too much, you can leave it under the charger for a few hours, as it will not help, you need to check the battery. If it is under warranty, you will be able to use it.

gradek83 · Accepted Answer

Open it carefully and use a multimeter on the V setting to check the voltage on the battery cables.

gradek83 · Accepted Answer

Did you open it? Have you checked the battery? The battery may be operational, it just needs to be brought to life. If you don't feel up to it, have it serviced.

Freddy · Accepted Answer

Measure the battery voltage with and without connected charger.
Connect the charger e.g. for an hour and then, while measuring the voltage all the time, disconnect the charger and see if the voltage drops.

RE306573 is a type of battery and its dimensions are: 3.0 x 65 x 73 mm.

yofi18 wrote:
Probably he will go to the hasiok, because I will probably not buy such a battery anywhere.

If you throw it away, I will gladly take it for a poor friend who learns "electronics"

I already gave him this type of "hasiok" and he was very pleased.
He just isn't afraid of damaging something more

So far, the recovery is ~ 5%, but for him it is a lot.

Freddy · Accepted Answer

The battery management chip is the AXP192. Now yes. Do you have any good lithium battery? You can do an experiment. unsolder the red cable from the battery and see if there is voltage there after connecting the charger.

Freddy · Accepted Answer

The middle one is 95% temperature control of the cell. You can try to move the electronics from the old one, or control the temperature while charging.

yofi18 · Answer

Yes - that's right - it hasn't been used for a long time. Ok then I'll put it on for the day and we'll see. Any advice on how to check the battery? Unfortunately it is no longer under warranty Thanks!

yofi18 · Answer

So I will. Nevertheless, I charged it 24h and nothing. With the cable connected, he tried to start, but only the LED turned on for a moment and that's it. Oh well. Probably he will go to the hasiok, because I will probably not buy such a battery anywhere. Thanks for the help.

yofi18 · Answer

Yes - I opened it, but I haven't measured it yet. I will do it tomorrow because I have no equipment in Krakow. The battery can be operational, it just needs to be brought to life - how? I was charging it for over 24 hours. This is what it looks like inside:

gradek83 · Answer

The battery is 5 years old so it's not that old. Desolder it Red is + and black - White is probably a temperature sensor, do not connect anything under it. If you have a meter and you are able to check the voltage on this battery, check and enter the value indicated by the meter. If below 3V, the protection electronics will not start charging, you would have to connect the cell with the protection electronics to the charging voltage of 4.2V, but 3.7V will also be ok. how much the rest is operational. Your friend Freddy has already given you the dimensions of the batteries.
New battery "Li-Po, Li-Poly 1500mAh 3.7V 3-wire battery" alledrogo .

yofi18 · Answer

Ok I understand So far, everything is clear. I will measure and let you know - I am very grateful for your help. I will try to let go of some of my ambitions and ask Dad for help. And if it fails - I will look for batteries. I guess it could be smaller?

Freddy · Answer

It can be one that will fit of course lithium.

yofi18 · Answer

Ok, so I measured - and it comes out 0. Both empty and after connecting to the charger. It measures around 4.8 at the entrance. So I think the battery was dead.

Freddy · Answer

Looks like it Take a clear picture of the plate, not at an angle but perpendicularly.

yofi18 · Answer

I send

yofi18 · Answer

I have already unsoldered the entire battery and ordered a new one. This manual is black magic to me I will let you know when I install a new one

Freddy · Answer

See if there is voltage now on the battery contacts after connecting the charger.

yofi18 · Answer

There isn't. It is at the entrance (at the charging socket).

gradek83 · Answer

And how did it go there?

yofi18 · Answer

Hey hey - I was just about to write Yes! Everything worked out and it looks like it even charges without a problem. It is true that I had to install a slightly smaller battery (1000 mAh), but that does not bother me. I am only surprised by one more thing: the new battery has only + and - (two cables). The middle white is not there. Will nothing happen because of this then? Nevertheless - thanks a lot

yofi18 · Answer

Thanks to the help of our forum colleagues!

yofi18 · Answer

Hi again,
I have the following problem. I have replaced the battery in my InkBook Classic reader. From 1500mAh I replaced it with a new 1000mAh. And, unfortunately, there was such a problem that:
1) the battery is charging very slowly
2) the maximum level of charge reached perhaps 48%. Usually it is around 39%. Even after 12-18 hours of charging.

What may be the problem? I measured the battery - the device showed 3.70. I also checked the charging socket and the result is about 5 there.

Thanks for the help!

gradek83 · Answer

Show me this new battery. I hope you didn't throw out the old one? Have you checked charging on a different USB cable or a different charger?

yofi18 · Answer

Oh, unfortunately I fired. I tried on a different cable - there are some that do not charge at all, but I have one that charges. I also tried various chargers - from iPhone to Alcatel. I just don't know what power they have. I also tried through the computer. As for the battery:

gradek83 · Answer

As a colleague Freddy wrote, you could transfer the electronics from the old battery to a new cell with the third wire from the NTC temperature sensor (thermistor). The charging system may have required this sensor to control the charging temperature. The lack of this sensor may cause charging problems, i.e. charging takes place but with a very low current.

I don't know what resistance the thermistor had at room temperature.

yofi18 · Answer

Chicken. Unfortunately. However, can this matter be settled? I can buy the cable, but the worse thing is that I do not know where you would have to solder (to the battery). Can I have a hint? Unfortunately, it's hard to find a battery in this size with 3 cables.

gradek83 · Answer

I'm not 100% sure, but something reminds me that the thermistor had 50K Ohm. If you have such a resistor at hand, you can solder it between the center pin and GND (-) ground for tests and see if the charging starts. If you don't have one, you can buy such a 50KOhm thermistor in some store

yofi18 · Answer

I see. Maybe I will ask a stupid question, but unfortunately I do not understand these topics. Doesn't my current battery have a thermistor to which I could solder the cable? Unfortunately, soldering such a thermistor to a battery is not feasible for me. Could there possibly be some other way to charge this battery bypassing this problem?

gradek83 · Answer

It is about connecting the thermistor as in the photo. Electronics may not have it with the current battery, but I'm not sure.

[Solved] InkBook Classic Reader Won't Turn On: No Response to Reset, Green LED On - Need Advice

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