I was building a new system with
Intel® PC-Mainboard DH87RL
2x Kingston KHX1600C10D3B1/8G acc. to tested memory list (3 other types tested before without success)
Samsung SSD 840 250 GB
Enermax ETL 300AWT
Monitor HP LP2475w
The long lasting story was published first in the heise forum in German (they suggested this low energy system). You can find the discussion here.
I will summarize as short as possible.
- At first start up there was no beep, no BIOS visible
- Started testing different memory types from local dealers without success
- Sent back the board to the supplier for exchange
- After new rebuild the same situation: no beep no BIOS visible
- Again new memory from local dealers and finally new order of memory from the tested memory list (see above)
- Still no success but I could see that the keyboard seems to get a signal from the board as the LED was switched on
- As the system was connected to the monitor via KVM switch I now tested it with the direct connection via DVI and also HDMI
- I could see that the monitor recognized the active connection to the PC but still no video signal came from the board to the screen
- Finally I plugged in an old MSI R4350-MD512H graphics card and now I got a video signal!
Now I could at first time step into the BIOS and also install the operating system and all the Intel drivers requested. To get rid of the old graphics card again I made the following changes in the BIOS:
- Changed "Integrated Graphics Device" from "Enable if Primary" to "Always enable" (did not solve the problem)
- Changed "Primary Video Adaptor" from "Auto" to "Int. Graphics (IGD)"
The system now boots without an additional graphics card but when you leave the system for 10 minutes and the monitor shuts down (due to energy savings settings) it will again wake up no more. You can log on "blindly" but this also does not wake-up the monitor. The only solution is to press the switch-off button to reboot the system. A non acceptable situation.
I would really know what needs to be done to get the system working correctly. At the moment it seems that the on board video is still unable to provide a correct signal for the HP LP2475w monitor. What help can you provide me after my long and deep analysis.