Wierd problem! Power settings

I am using S64240 LCD. I was trying hard to initialise the device. I am using SPI bus for communication. I was sending 0x00 & 0xFF to device. Yesterday managed to get device flashing all pixels on/off.

The problem is
If I send internal power regulator On command to Chip1 using CS1, the device will not respond
If the command is not send or send to CS2, the device is flashing the data.

As per the datasheet and connected schematics, the capacitors are connected to chip1, hence the power circuitry must be turned on and chip2 uses the same. In this case, even if I just reset the device and do not send any power commands and turn it on the device flashes the data.

I am completely confused on this operation. I belive there seems to be some problem but not able to figure out.

Any support is highly appreciated.