Question about Acer AL1716 17" LCD Monitor

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Capacitors problem Hi! I would like to know why if capacitor broke then the appliance stop working while we say capacitor is there to store charge. So my question is why the appliance fail to work while the power is there if the capocitor broke?

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  • Anonymous Mar 31, 2008

    NO POWER

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Capacitors have many functions depending upon the circuit. Perhaps the most common circuit where a bad cap will be a major problem is the power supply. Since these store charges, they are used to smooth out the DC current generated from AC power. If there is noise or ripple in the DC current, it can be interpreted as a signal and processed as such. This is just one example. There are hundreds more.
Dan

Posted on Mar 20, 2008

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Posted on Jan 02, 2017

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DON'T open an SMPS (Power Supply) unless you know how to properly discharge...


I AM A CHIPLEVEL SERVICE ENGINNER I DO CHIPLEVELSERVICING OF ALL MOTHERBOARD
FOR EXAMPLE THE SMPS FAN JUST INSTALIZING MEANS A DEAD SHORTING POWER SUPPLY SECTION OF MOTHERBOARD IF IT HAPPENS REMOVE THE PROCESSOR CHECK ALL THE POWER CONNECTION LINES FROM THE SMPS CONNECTION WITH ANY OF THE RESPECT OF GROUND IF ANY LINE IS FOUND SHORT CHECK WHICH COMPONENT IS PRIMERLY CONNECTED TO THE LINE AND REPLACE THEM
CONNECT THE PROCESSOR WITH ITS HEATSINK AND CHECK THE SYSTEM WETHER THE SWITCHING IS OK IF NOT CHECK THE POWER IC,RELEATED CHIP RESISTORS AND CAPCITORS,FET,TRACK OPEN

IF THE FET IS DAMAGED IT WILL SHOW INTIALL SWITCHING AT GATES IF IC IS DAMAGED IT WONT SHOW ANY SWITCHING

on Oct 30, 2010 | Computers & Internet

1 Answer

Dell e170s no power


Suggest you re-post in Televisions & Video

As far as I'm concerned there are no user replaceable parts inside.
I know you can replace power boards, switches, LCD screen, etc.
Problem most people fail to take into consideration, is there are CAPACITORS inside.

A Capacitor slowly builds up a charge, then releases it all at once.
A crude example would be a swimming pool filled up with a garden hose; then one wall of the pool is taken down all at once.
(This happens in milliseconds, though. Maybe Nanoseconds. What do I know?)

An example, is a lot of cameras use a Capacitor, or capacitors; for a flash unit.

Point?
When the Capacitor is disconnected from power, (Like monitor unplugged from power), the capacitor/s can store a charge for weeks, months, sometimes over a YEAR. (In fact many times)

If your finger/s touch the terminals of a Capacitor, the charge can be released to YOU.
If your finger/s complete a circuit, that one or more capacitors are in; the charge can be released to YOU.

Shock is BAD to -> FATAL.

That's why the outside of the monitor case states 'NO User Serviceable Parts', and 'Electrocution Hazard'

How is the unit worked on then?
The capacitors are PROPERLY discharged first.
NO........not with a screwdriver.

Good way to have molten metal burn into your eyes, and face.

Still feel confident about working on your monitor?
Good.
I feel better, warning a fellow human being about the dangers.
Thank you.

For additional questions please post in a Comment.
Regards,
joecoolvette

Mar 06, 2013 | Computers & Internet

1 Answer

How to disassemble the 2200 monitor


Made by who Paul?

Gateway?

Dell?

Who?

Just curious.

Also, do you know how to PROPERLY discharge capacitors?

Why?
See the hazardous electrocution markings on the outside of the monitor case?
They are FOR REAL.

Capacitors inside can store a charge for weeks, months, sometimes over a year, (Actually a LOT of times); after the unit is unplugged from power.

Your fingers touch the terminals on the bottom of a capacitor, the stored charge can be released to YOU!

Your fingers complete a circuit that one, or more capacitors are in; the charge can be released to YOU!

The shock is BAD to FATAL!

Now you can see my reluctance in giving disassembly instructions for a monitor.

Post back in a Comment.
Regards,
joecoolvette

Jan 21, 2013 | Computers & Internet

1 Answer

My plasma TV won't turn on. It worked just fine last night and has never shown signs of trouble. Are there common issues I should consider?


Hi,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Mar 21, 2011 | Philips Televison & Video

1 Answer

My deep well jet pump is not workin it is just humming but has power to it


Hi. The most likely cause is the start capacitor, located under the cap on the end of the motor. Trip the breaker before removing the screws on the motor cap. Capacitors are readily available from pump supply stores as well as appliance parts supply stores.
Best regards, --W/D--

Mar 03, 2011 | Home

1 Answer

Hi, i have a samsung T220HD , its working for 10 months and then the power on button just wont works , the led flashes up , and dies how can i solve this ? help will be greatfull thx !


Bad capacitors are a very common problem. They're like buckets that fill up and store energy so other parts have power to do their jobs. When the capacitors go bad they don't charge or a very slow to charge, and this can be your trouble. This site addresses his exact problem on your model, so you can see if self-repair is something you'd like to try. Good luck, and thanks for using Fixya!

Jan 06, 2011 | Samsung T220HD LCD Monitor

1 Answer

My spectronIC PLTV-3250 will not turn on. there is no green light or red light. we have checked the plug, its secure on both ends. the outlet works. what now. is there some kind of reset button or...


Hi,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Dec 26, 2010 | Televison & Video

1 Answer

My tv will not turn on and the standby light is flashing. is there anything that I can do?


Hi,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Dec 24, 2010 | Toshiba 27A33 27" TV

2 Answers

I was told my blower motor was bad,I replaced it and still wont work. Any thoughts? Thanks


DANGER: Capacitors can hold a charge for hours, or even days, after an electrical device is turned off. If you don't know what you're doing, simply do not touch any wires, or any places that wires can connect. You can receive a dangerous shock.

Getting to solutions, just at a guess, capacitors go bad more often than motors. Fans have a run capacitor, there might be a start capacitor also. Replacing them both is much cheaper than a service call.

The capacitor(s) is the gray thingie about the size of a deck of cards with wires going to it. Under $20, an appliance parts house is your best bet.

Use only an exact replacement, lay the old one(s) on the counter. The counterman will give you the right item.

Don't overlook the obvious. Bad switch. Loose wire. Blown fuse or tripped breaker. There's a disconnect on the wall, it might have a removable plug, is the plug firmly in?


Mar 28, 2010 | Intertherm P3RA-042K Air Conditioner

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