No signal, no noise

[gobo]

Heloo,
I need help in the diagnosis my DSO Shell.
The oscilloscope is a new problem occurred during the first run. It shows only the pulsing line (as in the picture).
All voltages are correct (V1, V2, V3 about 10mV). There also operates switching between bands AC, DC, GND.
On resistor R23 changes the voltage of 1V, 2V, 3V when switching - switch working. The display does not change AC/DC/GND.

[gobo]

Damaged STM. I gave the new. I closed jumper JP1 and JP2. Do not start in bootloader mode to program it. What am I doing wrong? Interface SPDT not see the CPU STM.

[jye1]

At bootloader mode there won't be any display on the LCD. You need run the Flash Loader Demonstrator and use it to communicate with the bootloader on the chip. Please take this as reference http://www.jyetech.com/Products/LcdScop ... pgrade.pdf .

[gobo]

Working

[eitve]

Hi,

I have some problem, my ST on DSO-150 was burned, so I order from Ali one. Question, how write bootloader on it ?

Answer here:
viewtopic.php?f=19&t=1009&start=20