How do I fix my WiFi cable. And how to disassemble my tablet and make the repair.

That depends on what is wrong on tablet and which tablet you have ? Brand, make, model, how old, what issue ?
example see
Samsung Galaxy Tab 2 7 0 repair disassembly manual guide

1 Move closer to the wifi router
2 take your tablet in for repair

Yes. Any local phone repair shop like for can normally repair the screen. Parts plus Labour run about 110 to 150 usd

plenty of guides here .most tablet are easy diy fixes

Android Tablet Repair

Open your tab and check the wire or flix of your wifi connection maybe it's broken connection then fix it by soldering iron

Have you tried a different charging cable?

Did you allow the battery to run down until it was completely drained?
- If so then try the following;

Watch this video (link below). You should only remove the back cover, disconnect and reconnect battery cable. Disregard the rest of the video as I could not find one doing ONLY what you would need to do. Follow the instructions to remove the back of the tablet then disconnect the battery cable(careful not to damage the circuit board), reconnect the battery cable, and replace the back cover. Connect the charger, within a minute the screen on the tablet will pulse/flicker which is good news, allow it to charge a while, turn on the device, turn off the wireless wifi, click the power button to turn the screen dark again, and allow to charge for another 6 hours or till fully charged (when not connected to wifi the background processes will affect the charge time, on a weak charger it may not even charge like from an usb port on a computer).

Again, you should only be concerned with the video up to about the 1 minute and 15 second mark. You only need to disconnect the cable then reattach it. ONLY DO SO if you are comfortable doing so. If you have never worked on electronics before or are uncomfortable find someone to do it for you.

Galaxy Tab 3 Battery Replacement and Screen Repair Disassemble and fix

The connector / ribbon cable on the screen may need re-seating correctly or the screen itself is faulty, it is not possible to say which without disassembly. Unless you know someone who is prepared to disassemble for little money or as a favour it it is not economically viable to repair.

Tricky repair, several ribbon cables to be aware of as they are easy to damage when removing old digitizer. It is best to take to a cell phone repair shop for the repair. If you are confident you can handle the repair yourself, there are several great videos on YouTube to get you pointed in the right direction. If you put in iPad 2 screen replacement in the YouTube search window it should pull them up for you. Good luck!!!

You can't. It's called a "stuck pixel"... a manufacturing or product defect. If it's under warranty, return it for repair or replacement. If not, you may be able to pay for a repair.

Nick

Need to find a repair shop that repairs this model.

Mark
Motorola Support