Self assembled PC; cpu Intel core i7; Win7/64
Graphics card: ASUS EAH4670/DI/1GD3/V2
Monitor: HP LP2475w connected to card via HDMI cable.
System has been running without a single hiccup for 3+ years, until yesterday.
Yesterday I disconnected all inputs and opened the case to install a memory upgrade (6GB to 16GB).
Reconnected all inputs. On attempting to boot the monitor firmware was unable to detect an active input and showed "CHECK VIDEO CABLE". Boot failed. Checked HDMI video cable at both ends and retry, several times. No joy.
I had a spare DVI cable handy and connected this between monitor and graphics card. Monitor recognized the DVI input and computer booted and ran without problem. New memory recognized and active.
My first assumption was that both the graphics card and monitor were functioning OK. The problem must be the HDMI cable itself. Ran out and purchased a new HDMI cable (rather expensive). Connected new cable to graphics card and monitor. Same problem recurred. "CHECK VIDEO CABLE"
Since the connection between graphics card and monitor functions perfectly via DVI, what is causing the failure to connect when using HDMI? Where should one look for a solution.
Thanks to anyone who can help.