IMX53 QSB cannot start

[marshallzhou]

Hi guys,

         I am a totally newbie with QSB, when I plugin the power, the FLT and 5V led light on. While I plugin the UART with my computer, seems computer cannot distinguish any new port. At the same time, when I press poweron button, the LCD has no display. Anything wrong with the board? Months before, it can start correctly. What happen? How can I diagnose? Thanks.

[Yuri]

Please check power voltages of i.MX53. Sometimes, because of "bad" power adapter, providing glitches, the PMIC may be damaged.   

[marshallzhou]

Thanks for ur reply, I'v used the original power adapter, I think it's ok.  I doubt if it's the os issue or the board is broken.  While I cannot get log from serial port, I totally don't know how to begin. Is there any way I can be sure the board is ok?  Any way to access the "BIOS" like PC or something like that?

[Yuri]

> ... I'v used the original power adapter ...

Good adapter - is "heavy" adapter.

After pressing power on practically all leds (except FLT) should shine.
If not - problems with power.

[marshallzhou]

Hi Yuri Muhin, After pressing power on, only the FLT and 5v led of the QSB shine, just as when plugin the power. And u said "If not - problems with power.", I thought that means the adapter is broken, after I bought the new one, the problem is same. And I can hear the board make a sound "zizi sisi" all the time. Any idea? How can I find the problem? Really thanks.

[Yuri]

Please check power supply voltages of i.MX53 chip - I am afraid PMIC of the QSB does not provide the voltages at all.

[marshallzhou]

Oops, I am not sure. Where is the chip, and how can I check it? I don't know the hardware at all. I am reaally confused with the integrated board.:smileyconfused: