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Thread ID: 30637	2003-02-26 06:14:00	Help with Monitor that didn't bounce	Nigel Thomson (629)	Press F1

Post ID	Timestamp	Content	User
124068	2003-02-26 06:14:00	Moving things around in the house, I knocked my entire system over, the monitor hit the deck with my fingers under it as I tried to catch it, and now it doesn't work. :_| I know there is probably little chance it is fixable, but on the off chance it can be fixed, i thought I would ask, the monitor is an old 14 inch phillips so it isn't worth taking to a repair shop, but are there specific things I can look for to see if it can be fixed? After all I am a poor student and a New or second hand monitor would be stretching my budget a little too much Any help would be much appreciated. Nigel thomson	Nigel Thomson (629)
124069	2003-02-26 06:52:00	Hi Nigel How hard did it hit the floor? If it was a real bang then something may have broken but a minor shock could have just dislodged a plug or something. If the case didn't break and the tube didn't pop then there's hope yet. Unplug it and take the back off, then use common sense and look for damage or anything that doesn't seem quite right. Having done all that, while the back is off plug it in and switch on to see if anything happens. If it still doesn't go but you hear any noise, post back the details and we'll go from there. For guaranteed results it would be an idea to have it connected to your computer in case it needs a sync signal to kick it off but be careful not to touch the interior as it is all live. Cheers Billy 8-{)	Billy T (70)
124070	2003-02-26 07:19:00	Hi Nigel I don't know about fixing monitors. I live in Christchurch and here we have a place called Molten Media. They recycle old computer equipment and sell used monitors starting at $5.00. You might be able to find a similar org. where you live. Good luck oldfart	oldfart (3118)
124071	2003-02-26 07:32:00	>If you are going to take the back off the monitor be very carefull as even though it may be turned off parts can still be carrying a massive charge of electricity.	mikebartnz (21)
124072	2003-02-27 04:23:00	You could courier it up to Robert 30 Fontenoy St Pt Chevalier Auckland $25 plus usually $10 parts. My TV that hit the floor was $35. Brilliant!	tech (456)
124073	2003-02-27 04:30:00	The insides of monitors and TVs can zap you, even after they've been turned off for some time. Take care!	Heather P (163)
124074	2003-02-27 04:33:00	If there was a hissing noise after the "sudden stop at the bottom" after gravity took over, the vacuum in the CRT will have escaped. :D There is no economic way to refill the CRT with vacuum. :-( Just look for "silly" things, like connectors, fuses shocked out of clips ... components at funny angles ... N.B. anyone who might wish to correct me about vacuum escaping ... please note that I marked this technical joke with an emoticon. It was a joke. OK?	Graham L (2)
124075	2003-02-27 05:47:00	The monitor is a Phillips 104s, When i turn it on the power up light comes on and stays on for about a minute the the light turns off and the speakers make a pinging sound (sort of like the sound you get when you test a glass to see if its crystal), when it dropped I heard no sound of cracking or of air rushing into the CRT tube. ?:| As for repairs I am invercargill and I have a feeling that the cost of repairs will outweigh the value of the monitor unfortunately. Thanks everyone for your help, and if anyone could explain the pinging to me that would be a great help >>PS Graham L I got the joke (but would it work if i put a straw in and sucked really really hard) :p	Nigel Thomson (629)
124076	2003-02-27 11:02:00	Wow, these things can shock you even after they are turned off? What other components can do this that we need to be aware off, and how do they do it?	Danger (287)
124077	2003-02-27 20:44:00	Hi Danger The two primary sources of shocks from a de-energised monitor are the EHT charge stored in the CRT, and the DC voltage stored in the main filter capacitor in the power supply . To get a shock off the CRT you would have to have removed the EHT connection from the side of the tube, and although the shock is nasty, it would not generally be considered dangerous unless you had a weak heart . Having said that though, any hand to hand shock presents a risk as the current through your chest could stop your heart . That has happened to otherwise healthy people . Shocks from the power supply usually catch you in the fingers as you place them on the bottom of the printed circuit board, but hand to hand shocks are also possible here if for example you were repositioning the chassis and grabbed the metal frame with your left hand and placed your right hand under the board to support it . Again this would not normally be considered dangerous, but you could drop the monitor from the surprise . Some components on the top of the chassis also carry these voltages, mostly around the high voltage switching transistor and some innocent looking pieces of metal can pack a punch! If the monitor has been switched off for several hours, most of these charges dissipate and then there is little or no risk . The CRT charge can remain longer in some instances however, and in low humidity environments it can still surprise you several days after the last use . It is also possible to get a small shock off the pins of the mains plug as there are noise filter capacitors across the input . These are commonly charged whenever plugged in as they come before the on-off switch . Whether or not they retain a residual charge depends largely on what stage of the mains cycle they are disconnected . If it is the zero crossing point there is no charge, and of course the maximum occurs at the peak . The stored energy is minimal and the shock is usually a harmless twiddle that just makes you jump . Cheers Billy 8-{) Disclaimer: The above has been written in general terms for the assistance of non-technical readers . If you are a technician, you already know about these things so there is no need to correct my simplifications . :D	Billy T (70)
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