What to do with tablet with broken power button?

Given: "domestic" tablet HP Android (in fact, the finest China, but I liked him) fell on the concrete.

Symptoms: from the button, the tablet will not turn on, only turns on by connecting USB cable. When you disconnect the cable continues to operate until the first screen off. The battery works, everything else-too.

Diagnosis: damaged, not the button itself, and a conductor between the button and the corresponding leg of the chip.

Question: what can a piece of metal to do? Throw a complicated piece of iron, which a failure in one far not the most important bit is not desirable.

Options:
1. To fix it.
1.1 Attempts to find any documentation on iron is futile.
1.2 Can t ospolzovat vozmozhnosti enable USB. For example, to hang the button on the connector to pull the right signal, and the animal revived.

2. To use something else. Don't even know how, for example, stationary (what can you do?).

Any options will be considered. Thank you in advance!
March 19th 20 at 08:35
6 answers
March 19th 20 at 08:37
Solution
If you forget about the repairs of iron, can suggest options:
1) always powered fixed server of some system
2) get root and (price battery) to write a program attempts to programmatically disable and enable the signal of the accelerometer. Or of the other buttons.

But all movements will be from the section "hobby, for which you do not mind the time", as if to calculate the monetary feasibility, then in addition to option 1 - all will be expensive.
Thank you! To admit, an answer like that I was expecting :)

"hobby, for which you do not mind the time",

It fits me :) - Kip commented on March 19th 20 at 08:40
March 19th 20 at 08:39
Solution
Try to rely on this phrase:
Diagnosis: damaged, not the button itself, and a conductor between the button and the corresponding leg of the chip.
It is known for sure, 100%? If the reason you believe this, then you first need to obtain confirmation - take, for example, probes from a multimeter with sharp tips and jumper them the most ragged conductor. Without disconnecting this jumper, press the power button. If the reason was really obrandom Explorer, the tablet turns on from the button, i.e., your diagnosis is confirmed.
Well and further all is simple - very carefully, sharpened soldering iron to solder between the leg of the chip and push-button permanent jumper of thin wire, and then use as usual. For such a case is well suited wire MGTF-0,03, he's no thicker than a sewing thread. If its nowhere to get, you can take the wrapping of PALSO and 0.12, tinned with stinging but it ends on a length no greater than 1 mm is quite difficult.
UPD: if the track is a ragged conductor is not visible (on multilayer boards is almost always) have to look for the scheme - at least of the same apparatus with the same percent and chipset.
UPD2: As it turned out, the processor of the device (SC7731G - SoC is responsible for all, including for food) is a BGA, which has insights not available and that I was going to suggest (to iterate over all pins) - will not work. Last chance - take advantage of the pull-up resistor on the line. power, if any. The voltage of this procedure was approximately 1.8 volts, the lift must go to him. First, we need to make sure the on button. supply voltage no (this will confirm the presence of a cliff). Then look on the Board all SMD-resistors with resistance of several tens/hundreds of kilo Ohm, but the ends of which there is voltage in the off state, and short-circuiting both ends of each resistor to the negative supply through a resistor of several hundred ohms (not to be a Shorty by accident). If the next shorting the tablet will be all the problem is solved, the line is found.
But there is a possibility that the lift signal lines to positive is done by the resistors built into the BGA. Well, then finish the race with a feeling that made everything possible, and put the tablet in the trash.
It is known for sure, 100%?

Yes. Button checked. It successfully switches the signal to ground.

jumper them the most ragged Explorer

that's it that's the problem. It is unknown where the conductor. And find out with a tester it is impossible, as it is cut. - Kip commented on March 19th 20 at 08:42
@Kip, then we need to get the email. scheme, and to decide on it. And will fit the scheme of any similar apparatus assembled using the same chips. Tell me what percent and what chipset (and the exact brand of tablet would not hurt), together Google and pandekten (ugh, how dissonant...). While I complement your answer.
Something can be done and if schema is not there. - christophe8 commented on March 19th 20 at 08:45
@christophe8
Thank you for your response!

The tablet Irbis TZ-54
Fee S706C-7731-D2(168)-V1.1
IC near the buttons:
1. SPRD SR3131 -- RF Tranciever
2. SPRD SC2662H -- RF Power Amp or other Power management data
3. SC2671H -- Video encoder/decoder
4. HS8308 -- ?
The chip under the nearby Silom:
5. SC7731G -- CPU/ROM/RAM (BGA)
6. PB021-125BT (BGA)
Without shilda:
7. FORESEE NCEMBSS9-16G -- MMC (BGA)

Search is probably in (2) or unknown (4). Less likely to (5) or unknown (6).
I spent a lot of time to find something for (2), but found only this - Kip commented on March 19th 20 at 08:48
@Kip,
Search is probably in (2) or unknown (4).
No, it turned out more. SC7731G processor is a SoC containing everything, including the power supply (hence the inclusion). Dataset on it free no English or even Chinese (see, company secret). Here is how it looks (on other device) -
IMG_0324_800.jpg
Worst of all, it is BGA, which has insights not available and that I was going to suggest (to iterate over all pins) - will not work. Last chance, write about it addition to answer. - christophe8 commented on March 19th 20 at 08:51
As it turned out, the CPU of the device (SC7731G - SoC is responsible for everything, including for meals)

HOW? How did You find out???

Thank you! A great idea to look for it. I somehow did not think. Sprinkle ashes. - Kip commented on March 19th 20 at 08:54
@Kip,
HOW? How did You find out???
Loaded into the search SC7731G and read the first few dozen search results, there were a lot of interesting. Dataset not found (although there were hints of its existence), but the General Datasheet has found. Well, the comments of specialists in different forums. - christophe8 commented on March 19th 20 at 08:57
@christophe8on SC2662H I not found. Seriously they have everything! - Kip commented on March 19th 20 at 09:00
March 19th 20 at 08:41
Solution
Photo frame or buy column and make Google assistant.
You can also download the APK from the play store and turn on the tablet with the vol+ button vol-
March 19th 20 at 08:43
Of course, to fix
To know how I would have fixed it. Perhaps even BGA can be soldered, but will have to turn to former colleagues. - Kip commented on March 19th 20 at 08:46
@Kip, what's the problem to put into service, not even to former colleagues (you have that 1 service the entire city?)?
>>damaged, not the button itself, and a conductor between the button and the corresponding leg of the chip.
The jumper wire that is already there should be able to solder - ally.Labadie99 commented on March 19th 20 at 08:49
@ally.Labadie99, the problem is not "solder", and "where to solder". We have services like screens and batteries, change only. Can cost to change, but to pay for the repairs the price of a new device won't matter. I don't mind the money, I need Global Justice. - Kip commented on March 19th 20 at 08:52
@Kipyou what the question asked, this answer received, I'm sorry, all heresy are - ally.Labadie99 commented on March 19th 20 at 08:55
@ally.Labadie99, the answer is as in the joke:
- Find x
- Here it is! - Kip commented on March 19th 20 at 08:58
March 19th 20 at 08:45
Repair, or replace with new)
New is. Bought a (Huawei BG2-U01). Is the brake. This is despite my more than modest timing requirements. Third do not want to buy already. - Kip commented on March 19th 20 at 08:48
@Kip, So I had to buy something more or less normal, it would not be hindered.
No offense - first look specs, then buy... - Ricardo_Sporer commented on March 19th 20 at 08:51
@Ricardo_Sporer, no hard feelings, I fully agree. Two reasons. why it happened:
1. Tablet needed urgently between the plane from Australia and a train to St. Petersburg. Ran. and in the first random salon when bought.
2. I never imagined that SUCH brakes is possible. The last time I have seen that when you run Windows95 on a 486 with 8Mb of RAM. :)
Sobsno a question of how to deal with the old tablet, which is not so slow (and therefore feel sorry for him). - Kip commented on March 19th 20 at 08:54
March 19th 20 at 08:47
Workshop to include, perhaps :) Or, if money Alles - to look for someone who will do this :)
Not good. The repair will be reduced to the replacement Board. It is comparable to the price of the tablet, if you do it yourself. Or more expensive if to give. - Kip commented on March 19th 20 at 08:50
@Kip, Yes, I agree. Modern tablets the departure of a single node leads to a complete replacement of everything that is often much more of the same, but new :) - adrian_Lind29 commented on March 19th 20 at 08:53
@Kip,
The repair will be reduced to the replacement Board. It is comparable to the price of the tablet, if you do it yourself. Or more expensive if to give.

Do not have. A small change services and features, if not too difficult. However, if diagnosed correctly, and the point in the track, hardly anyone will be with this dig. Especially in any snow Leopard.
Unless they go with the cry of the soul to the forum any plumber to peremeshku did :) - Ricardo_Sporer commented on March 19th 20 at 08:56
@Ricardo_Sporer, the jumper I can do if not BGA. The main thing-to understand where to do it, and documentation on the chip no. - Kip commented on March 19th 20 at 08:59
@Kip, go to the electronics forum and for Christ's sake ask for diagrams on the screen :) On specialized forums usually are people who have in the local archives is full of things nobody indexed beaver :) - adrian_Lind29 commented on March 19th 20 at 09:02
@adrian_Lind29, was already. Nope nothing there. :( - Kip commented on March 19th 20 at 09:05
@Kip, everything is there, the platform is not unique. Especially considering that snow Leopard does not do the tablets themselves, and order from OEM. - Litzy0 commented on March 19th 20 at 09:08
@Kip, Yah right! IRBIS hardly myself from scratch it sawed, probably stuffing takes someone and puts his body. - adrian_Lind29 commented on March 19th 20 at 09:11
@adrian_Lind29, so, no one claimed otherwise - Kip commented on March 19th 20 at 09:14

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