PMP 7280C 3g Quad, ERROR NAND FLASH NOT DETECTED

[XottaBb)4]

rNfxSmvhkaM.jpg3J0022GsGMA.jpg Пришел планшет PMP 7280C 3g Quad с проблемой зависания на включении, попытка сделать хардресет привела к зависанию на строке format. При проверке на флештуле выскочила проблема Error Nand Flash, после чтения получил кирпич. По usb определяется как Mediatek PreLoader USB VCOM. Предприняты попытки прошивкой 1.0.13 под флештул, приводят к error: ? (0x8)...
Подскажите куда копать, менять NAND или можно провести программный ремонт ?

============ Memory Detection Report ===========

Internal RAM:


External RAM:

	Type = DRAM

	Size = 0x40000000 (1024MB/8192Mb)

NAND Flash:

	ERROR: NAND Flash was not detected!

EMMC: 

	 EMMC_PART_BOOT1 	Size = 0x0000000000200000(2MB)
	 EMMC_PART_BOOT2 	Size = 0x0000000000200000(2MB)
	 EMMC_PART_RPMB 	Size = 0x0000000000020000(0MB)
	 EMMC_PART_GP1 	Size = 0x0000000000000000(0MB)
	 EMMC_PART_GP2 	Size = 0x0000000000000000(0MB)
	 EMMC_PART_GP3 	Size = 0x0000000000000000(0MB)
	 EMMC_PART_GP4 	Size = 0x0000000000000000(0MB)
	 EMMC_PART_USER 	Size = 0x00000001d5400000(7508MB)

UFS: 

	ERROR: UFS was not detected!

============	 RAM Test 	============

Data Bus Test: 

[D0]
[D1]
[D2]
[D3]
[D4]
[D5]
[D6]
[D7]
[D8]
[D9]
[D10]
[D11]
[D12]
[D13]
[D14]
[D15]
[D16]
[D17]
[D18]
[D19]
[D20]
[D21]
[D22]
[D23]
[D24]
[D25]
[D26]
[D27]
[D28]
[D29]
[D30]
[D31]
OK!!

Address Bus Test:

[A1]
[A2]
[A3]
[A4]
[A5]
[A6]
[A7]
[A8]
[A9]
[A10]
[A11]
[A12]
[A13]
[A14]
[A15]
[A16]
[A17]
[A18]
[A19]
[A20]
[A21]
[A22]
[A23]
[A24]
[A25]
[A26]
[A27]
[A28]
[A29]
OK!!

RAM Pattern Test :
Writing ...
	0x44332211, 
	0xA5A5A5A5, 
	0xA5A5A500, 
	0xA500A500, 
	0xA5000000, 
	0x00000000, 
	0xFFFF0000, 
	0xFFFFFFFF, 
OK!!

Increment/Decrement Test:
Writing...
OK!!