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#1
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Failure of monitor to wake-up when PC does.
Dear all,
Your assistance is required once again... When I tried to 'wake up' my PC last night (Compaq Presario 5000 with MV540 monitor), the PC burst into life, but the monitor remained on stand-by. after switching both PC and monitor on and off repeatedly (I can ususally hear a relay clicking away when normal wake-up is achieved), I disconnected the monitor and powered it. It displayed the usual RGB 'check-cable' indication, so I took the monitor to be working OK. I eventually got the monitor working by removing the video card (NVIDIA GeForce) and re-fitting it. Everything then powered normally. Is it likely to be a video card fault, or a motherboard fault? Any suggestions appreciated! -- Kind Regds, Russell W. B. http://www.huttonrow.co.uk |
#2
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Most likely the video card. Either replace it or avoid sleep mode.
HH "Russell W. Barnes" wrote in message om... Dear all, Your assistance is required once again... When I tried to 'wake up' my PC last night (Compaq Presario 5000 with MV540 monitor), the PC burst into life, but the monitor remained on stand-by. after switching both PC and monitor on and off repeatedly (I can ususally hear a relay clicking away when normal wake-up is achieved), I disconnected the monitor and powered it. It displayed the usual RGB 'check-cable' indication, so I took the monitor to be working OK. I eventually got the monitor working by removing the video card (NVIDIA GeForce) and re-fitting it. Everything then powered normally. Is it likely to be a video card fault, or a motherboard fault? Any suggestions appreciated! -- Kind Regds, Russell W. B. http://www.huttonrow.co.uk |
#4
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Thanks, guys...
I fitted a new graphics card (NVIDIA BFG with 64M ram), and all now OK. Considering I don't do games, there are all sorts of twiddles on this new card! My normal practice is to leave the PC switched on (Presario 5000 5WV254), and - when finished - put it into standby and turn the monitor off altogether, switching it on when next needed, and thus avoiding 'standby' mode (unless away for a short time). Is this wise practise? I remember years ago, on my old 8088 IBM, having trouble if I switched the monitor off, but I thought things had come on since then. -- Regds, Russell W. B. http://www.huttonrow.co.uk I'll place my money on the video card, especially if the inside of the computer chassis has/had a lot of dust and dirt inside. If the nVidia card has a fan clogged with dust, the graphics chip can overheat with resulting unpredictable operation. nVidia cards have a reputation for hot chips in more ways than one. The transistors inside a chip begin to break down when a chip is overheated for too long of a period of time... Ben Myers On 19 Oct 2004 00:59:30 -0700, (Russell W. Barnes) wrote: Dear all, Your assistance is required once again... When I tried to 'wake up' my PC last night (Compaq Presario 5000 with MV540 monitor), the PC burst into life, but the monitor remained on stand-by. after switching both PC and monitor on and off repeatedly (I can ususally hear a relay clicking away when normal wake-up is achieved), I disconnected the monitor and powered it. It displayed the usual RGB 'check-cable' indication, so I took the monitor to be working OK. I eventually got the monitor working by removing the video card (NVIDIA GeForce) and re-fitting it. Everything then powered normally. Is it likely to be a video card fault, or a motherboard fault? Any suggestions appreciated! -- Kind Regds, Russell W. B. http://www.huttonrow.co.uk |
#5
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There are two schools of thought regarding whether one should turn off the power
on a computer or not. One school says that shutting down the computer entirely eliminates wear and tear on moving parts, most notably hard disk drives and cooling fans. But powering up a computer causes a momentary surge of current which can wear out sensitive integrated circuits. The other school says that keeping a computer powered up preserves the electronic parts, which do not receive a slight power surge every time the computer is powered up. If the operating system AND the motherboard design together do a superb job of managing standby mode, the hard drive spins down, the CPU generates less heat, and the cooling fans either stop spinning or spin only occasionally. Unfortunately, neither Microsoft nor motherboard manufacturers have gotten standby mode to be 100% foolproof. Not yet. Certainly if one lives in an area of unreliable electric power, powering down the computer is probably best. When electrical current returns after a power outage, it sometimes surges and burns out the power supply, occasionally taking other components out if the surge is strong enough. I've been a member of the former school of thought ever since the days of the original IBM PC. My reasoning is that the data on the hard drive of my computer is the most valuable and most difficult to replace (even with regular backups). If the computer is powered down when not in use for extended periods of time (my rule of thumb is 3 or 4 hours), and it is protected by a good quality surge protector, then the hard disk will escape damage from transient power surges and other unpleasant electrical phenomena. EVERYTHING else in a computer can be replaced at reasonable cost. The data on the hard disk cannot. The choice is yours. I've tried to provide an objective view of both sides of the argument... Ben Myers On 20 Oct 2004 01:04:16 -0700, (Russell W. Barnes) wrote: Thanks, guys... I fitted a new graphics card (NVIDIA BFG with 64M ram), and all now OK. Considering I don't do games, there are all sorts of twiddles on this new card! My normal practice is to leave the PC switched on (Presario 5000 5WV254), and - when finished - put it into standby and turn the monitor off altogether, switching it on when next needed, and thus avoiding 'standby' mode (unless away for a short time). Is this wise practise? I remember years ago, on my old 8088 IBM, having trouble if I switched the monitor off, but I thought things had come on since then. -- Regds, Russell W. B. http://www.huttonrow.co.uk I'll place my money on the video card, especially if the inside of the computer chassis has/had a lot of dust and dirt inside. If the nVidia card has a fan clogged with dust, the graphics chip can overheat with resulting unpredictable operation. nVidia cards have a reputation for hot chips in more ways than one. The transistors inside a chip begin to break down when a chip is overheated for too long of a period of time... Ben Myers On 19 Oct 2004 00:59:30 -0700, (Russell W. Barnes) wrote: Dear all, Your assistance is required once again... When I tried to 'wake up' my PC last night (Compaq Presario 5000 with MV540 monitor), the PC burst into life, but the monitor remained on stand-by. after switching both PC and monitor on and off repeatedly (I can ususally hear a relay clicking away when normal wake-up is achieved), I disconnected the monitor and powered it. It displayed the usual RGB 'check-cable' indication, so I took the monitor to be working OK. I eventually got the monitor working by removing the video card (NVIDIA GeForce) and re-fitting it. Everything then powered normally. Is it likely to be a video card fault, or a motherboard fault? Any suggestions appreciated! -- Kind Regds, Russell W. B. http://www.huttonrow.co.uk |
#6
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Many answer this 'leave power on or turn it off' question
without doing step one - first learn the numbers. Too often, the answer is simply based upon wild speculation about stresses that don't really exist. Power cycling does affect life expectancy. The numbers: A power switch is rated for about 100,000 cycles. IOW that is power cycling the machine seven times every day for ... 39 years. The lowest power cycling number I had ever seen was on a IBM disk drive rated for 40,000 cycles - which is power cycling seven times every day for .... 15 years. So yes, they did not lie when they said power cycling can shorten the life of a computer. And then we apply the number they forgot to learn. 15 and 39 years? Who cares? In reality, power cycling has no adverse effect on properly functioning hardware. Hours of operation is a more critical numbers because excessive hours of operation are more often a reason for system not powering on. After too many hours, the weakened component fails on powerup. Again, if numbers or manufacturer datasheet specs are not provided, then the 'expert' is no expert. Instead he meets the definition of 'junk scientist'. Junk scientists fear numbers. Furthermore, if power on is so destructive to computers, then power on is also destructive to TVs, radios, and all other household appliances. Leave all TVs on 24/7 if you believe those half truths about computer power on. No, there is little debate among the experts. Turn the machine off or put it to sleep when done. Myth purveyors claiming to be experts never provide numbers. No numbers means he is a junk scientist. The myth purveyor did not lie. He simply deceived by forgetting to provide the numbers. As for a plug-in protector, it can even contribute to damage of the adjacent and powered off machine. It does not even claim to provide protection from electrical transients that typically damage computer hardware. This is another and longer topic best answered elsewhere. Do you think that silly little box adjacent to a computer will stop, block, or absorb what miles of sky could not? The surge protector must do just that to accomplish the protection that others claim. Even the manufacturer does not claim to protect from the typically destructive type of transient. Details on effective protection that costs about $1 per protected appliance is introduced in "Pull the wall plug or not?" in nz.comp on 7 Sept 2004 at http://tinyurl.com/5ttwl Turn the machine off or put it to sleep when done as the end of the day. Is that monitor causing video card damage? Step one - do both monitor and PC share the exact same wall receptable and is that wall receptacle the three wire (safety grounded) type? Is the wall receptacle safety ground pin actually connected to safety ground? Yes, power on could created trivial little transients that are normally grounded by the safety ground. No safety ground on either machine or separated safety grounds can result in a destructive ground loop through low voltge video cables into video controller. Ben Myers wrote: There are two schools of thought regarding whether one should turn off the power on a computer or not. One school says that shutting down the computer entirely eliminates wear and tear on moving parts, most notably hard disk drives and cooling fans. But powering up a computer causes a momentary surge of current which can wear out sensitive integrated circuits. The other school says that keeping a computer powered up preserves the electronic parts, which do not receive a slight power surge every time the computer is powered up. If the operating system AND the motherboard design together do a superb job of managing standby mode, the hard drive spins down, the CPU generates less heat, and the cooling fans either stop spinning or spin only occasionally. Unfortunately, neither Microsoft nor motherboard manufacturers have gotten standby mode to be 100% foolproof. Not yet. Certainly if one lives in an area of unreliable electric power, powering down the computer is probably best. When electrical current returns after a power outage, it sometimes surges and burns out the power supply, occasionally taking other components out if the surge is strong enough. I've been a member of the former school of thought ever since the days of the original IBM PC. My reasoning is that the data on the hard drive of my computer is the most valuable and most difficult to replace (even with regular backups). If the computer is powered down when not in use for extended periods of time (my rule of thumb is 3 or 4 hours), and it is protected by a good quality surge protector, then the hard disk will escape damage from transient power surges and other unpleasant electrical phenomena. EVERYTHING else in a computer can be replaced at reasonable cost. The data on the hard disk cannot. The choice is yours. I've tried to provide an objective view of both sides of the argument... Ben Myers |
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