PWR ON Error on channel VCC. Overcurrent detected!

[edbrandt]

Hi

I have an old flash-card with a Phison controller and four nand chips. I was able to read the first two chips (ECD514B6 74ECD514 K9GAG08U0M), but the other two gave an error "PWR ON Error on channel VCC. Overcurrent detected!" when I tried to read the chip ID.

After reading these two posts:

viewtopic.php?p=32316#p32316
viewtopic.php?p=30750#p30750

...my conclusion is that the problem either is caused by:

1. dirty connectors (I've tried to clean them)
2. wrong power scheme parameters (I've tried various settings, but If anyone could elaborate on how to set this correctly that would be great)
3. shorted chip (can I confirm this in other way, and does this mean there is no hope)

Anything besides this I've missed? What can I do from here?

Thanks!

-Espen

[Roman_TS]

Please note that we are not provide technical support on Forum. If you want to solve this case - please contact to ACELab technical support dpt.

[edbrandt]

Sure..

This case is only for training purposes (same chips I asked about in this post: viewtopic.php?p=33079#p33079)

It was more ment as a question on best practice in such case.

But actually; I did additional cleaning on the connectors using a fiber brush, and eventually I managed to read the last two chips. So even if I did start out cleaning the connectors withou luck, more cleaning seemed to be the solution.

Thanks
-Espen