My desktop computer is does the following randomly -- after long periods of working fine, months sometimes, turning on fine: Both HDMI and VGA refuse to send anything to the displays (different displays and cables make no difference in the 20+ times I've dealt with it). Usually I take all inputs from the slots on the computer while its power is switch off, holding the power button for 40 seconds and inserting only the display cable, turning the computer on again, which makes it output to the monitor again. This, or I leave it for a day or so and try the trick again.
Problem is, I have no idea how to pinpoint the problem and reliably fix it. This usually happens after a week or more of not using the computer, but it's not predictable...
Right now the issue has come back again, so I've used Windows-Key + Enter to put narrator on and logged on just fine, blindly. The problem is, I don't even know where to look for this problem, before figuring out how to do it blindly, if that's the best solution.
Just to clear up the last bit, which makes it even more confusing: when the display outputs correctly the computer itself works faultlessly (bar a really loud noise that I can only guess is the fan, whenever I sit at my menu of games such as Rocket League or Cities Skylines).
Please help me fix it, this has been a problem on and off with this computer for past 2 years.
Computer Info: Advent DT3415 Desktop PC
Type: Desktop PC
Processor: Intel® Core™ i7-3770 Processor (3.90 GHz, 8MB cache)
Operating system: Windows 10
Storage: 2TB HDD, 7200rpm
RAM: 8GB DDR3 (16GB maximum installable RAM)
Graphics card: AMD Radeon HD 7770
Graphics card memory: 1GB DDR5
Motherboard: Customised ECS H61H2-MV
Wireless: Ralink 802.11 b/g/n 150 Mbps USB dongle
Ethernet: Gigabit Ethernet (10/100/1000)
USB: USB 2.0 x 6
Video interface: HDMI x 1; DisplayPort x 1; DVI-I Dual Link x 1; VGA x 1
2 Answers
Try blowing on it to make sure there's no dust there, and making sure it's absolutely securely fastened into the socket (that the little lever is all the way in) -- taking it out and putting it back in again. You might also want to try switching out any cables you may have running to it from the power supply too.
A hardware fault could be causing the intermittent issue, particularly if it's causing the card to not make the connection properly with the motherboard (damage to the graphics card pins, for example -- when you take all the cables out it may jiggle it, which could cause it to work for a short time). Also, if there is a power cable running to the graphics card and it's damaged, that could also cause the intermittent issue.
check power supply unit, it must be 500 watt at least, to feed up your graphic card, then update your graphic driver software with the latest version. inspect and clean GPU from dust, clean your windows os with CC Cleaner and see what happens, good luck
