[General Questions and Answers] SherlockPotato:
A few days ago, I went to sleep and, as usual, I left my phone charging. In the morning, it didn't show any signs of life. It doesn't boot, no matter what. I supposed it's hard bricked.

I haven't changed any ROMs recently, so it could be a hardware issue but I have no way of checking. The computer recognizes it as a MediaTek Usb Port and the little red light lights up when charging.

What I've tried to do to fix this:

-Multiple combinations of button pressing and battery removal/insertion.

[*]-Charging battery with a battery charger.

[*]-Flashing stock rom with SP Flash Tool (Here is where it gets tricky):

I can't, no matter what, flash a ROM. Different versions of Flash Tools show different errors. The most recent shows error 4001. Some errors that also appear are 3186 and 8046. On one version I got it to do the EMMC Test and it shows that both EMMC and NAND Flash are not detected . Does it mean that there is a problem with the EMMC chip?​

Here are the specs of the phone:

Cellular

Technology

WCDMA (UMTS) / GSM

Type

smartphone (Android OS)

Integrated Components

FM radio, front-facing camera, navigation, rear-facing camera

Navigation

A-GPS, GPS

Band

WCDMA (UMTS) / GSM 900/1800

Mobile Broadband Generation

4G

Phone Form Factor

touch

Service Provider

not specified

Operating System Family

Android

Operating System

Android 4.4 (KitKat)

Input Device

Multi-touch, capacitive

Details

Integrated Components

Rear-facing camera, front-facing camera, FM radio, navigation

Body Color

Black

Miscellaneous

Color

black

Color Category

black

Body Material

plastic

Messaging & Internet

Messaging Services

MMS, SMS

Supported Social Networks and Blogs

Yes

Display

Technology

IPS

Display Resolution

1280 x 720 pixels

Diagonal Size

5 in

Diagonal Size (metric)

12.7 cm

Smartphone Diagonal Size

5 in

Color Support

color

Display Languages

Afrikaans, Arabic, French, German, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Korean, Latvian, Catalan, Macedonian, Malay, Norwegian, Persian, Polish, Russian, Serbian, Spanish, Swahili, Thai, Chinese, Ukrainian, Croatian, Danish, Dutch, English, Estonian, Filipino

Processor

Clock Speed

1.7 GHz

Processor Core Qty

8-core

Communications

Data Transmission

EDGE, FDD-LTE, GPRS, HSDPA, HSPA+, HSUPA, TDD-LTE

Data Transmission Operating Frequency

LTE 1800/2100/2600

Wireless Interface

Bluetooth, IEEE 802.11b/g/n

Camera

Camera Light Source

flash

Features

video recording

Multimedia

Graphics Accelerator

Mali 450 MP4

Memory

Supported Flash Memory Cards

microSDHC - up to 32 GB

Battery

Capacity

2250 mAh

Run Time Details

Talk (GSM): up to 600 min

Talk (WCDMA): up to 450 min

Standby (GSM): up to 276 hrs

Standby (WCDMA): up to 228 hrs

Digital Camera

Camera Light Source

flash

Features

video recording

Header

Brand

Lenovo

Product Line

Lenovo

Model

A806

Packaged Quantity

1

CE Input Device

Type

touch sensitive screen (multi-touch)

Touchscreen Technology

capacitive

Features

Phone Functions

call timer, conference call, speakerphone, vibrating alert

Additional Features

Alarm Clock

RAM

Installed Size

2 GB

Flash Memory

Internal Memory Capacity

16 GB

Max Supported Size

32 GB

Supported Flash Memory Cards

microSDHC

Graphics System

Graphics Accelerator

Mali 450 MP4

Optical Sensor

Sensor Resolution

13 megapixels

Front-facing Camera

Sensor Resolution

5 Megapixel

Dimensions & Weight

Width

2.8 in

Depth

0.4 in

Height

5.5 in

Weight

4.94 oz

General

Manufacturer

Lenovo

If someone could help me, I don't really know what else to try. I'll kindly provide any further information needed.

Thanks in advance.