[Android Q&A, Help & Troubleshooting] NickyYTSRB:
Tablet info:

Manufacturer: Vivax

Model: TPC-804 3G

Cards: No Sim and No SD Card installed

CPU: MT8321A

Board QR Sticker: 0600-MW86Q9-00R|180113|00827

Board Sticker 2:

K706H (LZ)

SN: JY171212000238

K706.N0.V10.8.RC-V04.B128H.Low--8(chinese characters)

System: Android 7.0/7.1 Stock (never modified, unrooted)

I did factory reset and after factory reset most of the apps started popping up "Has stopped working..." while in wizard for first setup after factory reset. Then after i logged into google account i just wanted to format sd card and when i pulled from top of the screen to bottom to see notifications the tablet just froze. Now it wont boot, stuck at logo while kernel is loading. Recovery does not work also(perhaps cuz of kernel not booting?). Only fastboot mode works but bootloader is locked(OEM unlock not checked in andorid) and i cannot unlock it. I also dont have original rom and cannot find it.

Kernel log seems okay but then the kernel gets stuck in some kind of loop and wdt kicks every few seconds. Here is example:

[ 209.689518] <2>.(2)[151:wdtk-2][WDK]: kick Ex WDT,RT[209689509961]
[ 213.479513] <2>.(2)[116:hang_detect][Hang_Detect] hang_detect disabled.
[ 213.516845] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 213.519550] <0>-(0)[0:swapper/0][Power/swap]CNT(dpidle,rgidle): [0] = (0,42698), [1] = (0,5026), [2] = (0,33479), [3] = (0,154),
[ 213.521005] <0>-(0)[0:swapper/0][Power/swap]dpidle_block_cnt: [by_cpu] = 10737, [by_clk] = 0, [by_tmr] = 0, [by_oth] = 0, [by_vtg] = 0,
[ 213.522536] <0>-(0)[0:swapper/0][Power/swap]dpidle_block_mask: 0x00000000, 0x00000000, 0x00000000, 0x00000011, 0x00000010, 0x00000010, 0x00000c03, 0x0000000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
[ 213.527588] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3834,3795),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(94,94),UI_SOC=95,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3301
[ 213.529388] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=95, SOC=94, counter = 4
[ 213.530351] <2>.(2)[146:bat_thread_kthr]UI_SOC=(95), resetBatteryMeter=(0)
[ 213.531208] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 216.119554] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---
[ 218.530352] <0>-(0)[0:swapper/0][Power/swap]CNT(soidle,rgidle): [0] = (0,43697), [1] = (0,5026), [2] = (0,34247), [3] = (0,154),
[ 218.531808] <0>-(0)[0:swapper/0][Power/swap]soidle_block_cnt: [by_cpu] = 5522, [by_clk] = 0, [by_tmr] = 0, [by_oth] = 0, [by_vtg] = 0,
[ 218.533327] <0>-(0)[0:swapper/0][Power/swap]soidle_block_mask: 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
[ 223.516871] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 223.527603] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3831,3792),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(94,94),UI_SOC=95,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3219
[ 223.529404] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=95, SOC=94, counter = 5
[ 223.530366] <2>.(2)[146:bat_thread_kthr]UI_SOC=(95), resetBatteryMeter=(0)
[ 223.531223] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 226.127537] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---
[ 229.699519] <2>.(2)[151:wdtk-2][WDK]: kick Ex WDT,RT[229699511085]
[ 233.516903] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 233.529656] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3829,3790),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(94,94),UI_SOC=95,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3246
[ 233.531457] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=95, SOC=94, counter = 6
[ 233.532397] <2>.(2)[146:bat_thread_kthr]UI_SOC=(95), resetBatteryMeter=(0)
[ 233.533258] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 236.134380] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---
[ 243.489509] <2>.(2)[116:hang_detect][Hang_Detect] hang_detect disabled.
[ 243.516925] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 243.529674] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3827,3787),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(93,93),UI_SOC=95,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3287
[ 243.530711] <2>-(0)[0:swapper/0][Power/swap]CNT(dpidle,rgidle): [0] = (0,47909), [1] = (0,5026), [2] = (0,38968), [3] = (0,154),
[ 243.530721] <2>-(0)[0:swapper/0][Power/swap]dpidle_block_cnt: [by_cpu] = 10697, [by_clk] = 0, [by_tmr] = 0, [by_oth] = 0, [by_vtg] = 0,
[ 243.530732] <2>-(0)[0:swapper/0][Power/swap]dpidle_block_mask: 0x00000000, 0x00000000, 0x00000000, 0x00000011, 0x00000010, 0x00000010, 0x00000c03, 0x0000000c, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
[ 243.536757] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=94, SOC=93, counter = 0
[ 243.537697] <2>.(2)[146:bat_thread_kthr]UI_SOC=(94), resetBatteryMeter=(0)
[ 243.538559] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 246.141177] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---
[ 248.542132] <0>-(0)[0:swapper/0][Power/swap]CNT(soidle,rgidle): [0] = (0,48767), [1] = (0,5026), [2] = (0,39917), [3] = (0,154),
[ 248.543589] <0>-(0)[0:swapper/0][Power/swap]soidle_block_cnt: [by_cpu] = 5070, [by_clk] = 0, [by_tmr] = 0, [by_oth] = 0, [by_vtg] = 0,
[ 248.545109] <0>-(0)[0:swapper/0][Power/swap]soidle_block_mask: 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
[ 249.709513] <2>.(2)[151:wdtk-2][WDK]: kick Ex WDT,RT[249709504902]
[ 253.516957] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 253.527682] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3824,3784),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(93,93),UI_SOC=94,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3309
[ 253.529511] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=94, SOC=93, counter = 1
[ 253.530451] <2>.(2)[146:bat_thread_kthr]UI_SOC=(94), resetBatteryMeter=(0)
[ 253.531311] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 256.147945] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---
[ 263.516979] <2>.(2)[146:bat_thread_kthr][BAT_thread]Cable out
[ 263.527102] <2>.(2)[146:bat_thread_kthr]AvgVbat=(3821,3781),AvgI=(0,0),VChr=198,AvgT=(25,25),SOC=(93,93),UI_SOC=94,ZCV=3992,CHR_Type=0 bcct:0:0 I:7000 Ibat:-3352
[ 263.528903] <2>.(2)[146:bat_thread_kthr][Sync_Real] UI_SOC=94, SOC=93, counter = 2
[ 263.529865] <2>.(2)[146:bat_thread_kthr]UI_SOC=(94), resetBatteryMeter=(0)
[ 263.530722] <2>-(2)[146:bat_thread_kthr]mtk_rtc_hal_common: rtc_spare_reg[0] = {32796, 127, 8}
[ 266.151446] <0>-(0)[0:swapper/0][Power/swap]DP: No enter --- SODI: No enter ---

Any hope of fixing this? This tablet is really important to me, not because of data on it just...