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by iosabi
Wed Oct 09, 2019 9:30 am
Forum: General discussion
Topic: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin
Replies: 21
Views: 2060

Re: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin

Timg236, first of all thank you for following up on this issue. Really appreciate your time looking into it. I measured the sdcard slot lines without any sdcard in it. All of them remain low, except for the sdcard Vdd which comes high (3v3) ~70ms after power is applied to the 5v lines in the gpio po...
by iosabi
Tue Oct 08, 2019 12:08 pm
Forum: General discussion
Topic: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin
Replies: 21
Views: 2060

Re: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin

"Does this happen if you remove the SD-CARD and power on ?" Yes, same symptoms with or without an sdcard installed. I probed around the EEPROM with the oscilloscope and found out that the EEPROM is not even read: 1) On my healthy Pi4B without an sdcard, when probing the #CS (pin 1) and CLK (pin 6) o...
by iosabi
Tue Oct 08, 2019 10:31 am
Forum: General discussion
Topic: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin
Replies: 21
Views: 2060

Re: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin

I assume you've read the Pi4b section of the.boot sticky? https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=58151#p1485558 Yes, from that and the https://www.raspberrypi.org/documentation/hardware/raspberrypi/booteeprom.md all tends to indicate corrupted EEPROM. The problem here is that I can...
by iosabi
Tue Oct 08, 2019 12:33 am
Forum: General discussion
Topic: Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin
Replies: 21
Views: 2060

Raspberry Pi 4 bootloader corrupt, can't update EEPROM with recovery.bin

I have two Raspberry Pi 4 4GB, one of them works just fine, but the other one doesn't boot when using the exact same SDCARD. I suspect the SPI EEPROM is corrupted somehow. I followed the instructions in https://www.raspberrypi.org/documentation/hardware/raspberrypi/booteeprom.md but that didn't work...

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