Author Topic: NAND Flash worn out  (Read 2668 times)

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df8oe

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NAND Flash worn out
« on: April 07, 2017,03:20:04 »
Hi folks,

I figured out many LCDs using Vestel-based boards with "only blinking LEDs" have worn out NAND flash chips. If power supply is working well (no capacitor problem) NAND flash is main problem. I unsoldered NAND128W3A from Vestel 17MB70 which normally should have 16MB capacity but when reading it with a NAND programmer it shows nearly 5MB bad blocks! Some mainboards do have one big NAND, some do have two (one big and one small)...

My question is: Has anybody tried to swap faulty NAND with a brandnew (empty) flash and tried a firmware update via USB? Is that possible or is bootloader which starts USB update located in NAND, too so that using a new (empty) flash update cannot start? Because of it is TSOP48 package I do not want to try without need....

Greetings
df8oe

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