The machine doesn't pick up signals from time to tome, according to the LOGO and is capable of detecting analog or digital signal port. No matter meet VGA or DVI signal is a flower screen, press the OSD menu is normal. Ng9service manual download site
 Ng9service manual download site
This problem is also a common fault of the samsung series 9, this series of displays no use NT68F63L, G + SCALER or WT61P4 + SCALER, it USES single chip solutions MagiCColor chip (SE657MRH - LF) + MX25LV001 scheme. To store the MCU program by 25 chips, decoding and AD MCU control single chip. Ng9service manual download site
 Ng9service manual download site
 Ng9service manual download site
Don't pick up the signal LOGO image is normal, just connected to signal flower screen, judging panel no problem, the fault in the driver board, may be program or a SCALER (SE657MRH - LF) chip. Ng9service manual download site
 Ng9service manual download site
This machine use 25 chip solution, so to 25 chip replacement program, first results failure, still can determine is improper SCALER chip. The decoding chip, by hand without a corresponding finally replace the driver board troubleshooting.Ng9service manual download site