Flashing... incorrect preloader problem... bricked tablet... - Android Q&A, Help & Troubleshooting

I have this friends tablet for a week or two.
I found, i think, right firmware, and that's one problem solved, i hope.
The other problem is, i got this tablet along with the flashing problem. I think SP flashing tool was used, but with a wrong firmware, and now is preloader messed up... (sry for my bad english)
Name of the tablet: Xwave Xpad 3G-701
Now, my problem is that i can't access anything, tablet just won't strat, computer can't recognize it, and so on, dead in other words.
specs:
OS: Android 4.2 Jelly Bean
GPU: Mali 400 MP, 3D OpenGL (ES 2.0)
Screen: 7 inch, 1024x600
Processor: 1.3Ghz Dual-Core ARM Cortex-A7 (MediaTek MT8312)
Ram: 512MB DDR2
Memory: 4GB
Motherboard is: ELINK_MR706_D3_V6 20140114
To avoid any forum rules problem, i added only dropbox link paths off the images... so i could explain my USB issue.
dropbox.com/s/4yhbbmbdc9z8gds/DSC_0115.JPG?dl=0 -- phone
dropbox.com/s/qefe24v4l6o96pj/DSC_0117.JPG?dl=0 -- motherboard
Computer can't recognize it, i tried many variants, it's just not working.
In motherboard picture, whole surface is covered with protection, only some ponits are accesible.
My question is, what is the procedure to unbrick this tablet particularly... to force the right preloader in it, and become recognisable by computer? The rest might be familiar to me.
Is it required to detach battery, as some procedures suggest...?
My apology if this is somewhere else asked, i just couldn't find ant explanation for this model.
If my question is unclear, i'll add any info or change needed....

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PD: I'm not sure where I post this, I think it's the best site. Sorry if you don't understand me, my English isn't the best.
temerariomalaga said:
Hi, I've a problem with a tablet Wolder mitab Iron. I know that this tablet is unknow for much people. Well, my uncle try to move app to external SD card and he unmount the "hard disk" of the tablet. He gave me the tablet to repair it and I run the recovery mode for do a hard reset but it doesn't do nothing, Android not run. Then I install the firmware of Wolder mitab New Age but when Android stars the touch screen doesn't work. He gave me other mitab Iron and I installed CWM and I brick the tablet, it doesn't run Android or Recovery mode. Can someone tell me one soluciton for this? Is there a ROM for this tablet for repair the first table? Is there one solution to repair the second table?
The tablet has the follow specifications:
-Andoid 4.2 (Jelly Bean)
-CPU Cortex A9 Dual Core 1GHz
-Chipset Allwinner 20
-RAM 1GB
-Graphics Mali 400 Dual Core
-4 GB of internal memory
Help!!:crying:
PD: I'm not sure where I post this, I think it's the best site. Sorry if you don't understand me, my English isn't the best.
Click to expand...
Click to collapse
here you can find rom for wolder mitab iron 9"
can not put address
I attached a picture of address

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