Question about Thermaltake (LANFIRE) ATX Mid-Tower Case

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Power supply is dying.

My 420W power supply has a problems. Otput voltages is float. I found 2 bad capacitors and fixed it. But +12V left floating. If I will have shematic I will fix this problem faster.

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The following site will give you a wide selection for service manuals and schematics for various consumer products. I have used this site many times with no problems in finding what I needed. I hope this helps and let me know if you need further assistance if you can not find what you need and I will do some more research for you.

If you do not mind, would you please rate my help as I really do appreciate it. Thanks.

Posted on Jul 07, 2008


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Posted on Jan 02, 2017


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Dell e5520 freezing

1. Dying power-supply is creating unstable voltages
2. Dying capacitors on motherboard are unable to stabilize voltages
3. bad RAM (compare to writing in pen on greasy paper -- nothing is realiably being recorded)
4. bad spots on disk-drive (computer is spending too much time trying to write to those "bad" spots)
5. other "dying" issues with the motherboard

1. different power supply
2. if you have more than one stick of RAM, remove one and test-drive. Repeat with the other stick(s).
3. Try different RAM.
4. Force CHKDSK ("Check Disk") utility to scan *all* of the disk-drive.
5 Inspect the motherboard for bulging/leaking capacitors.
6. Replace the motherboard.
7. Replace the whole computer.

May 27, 2014 | Dell Computers & Internet

1 Answer

Tv won't turn on. replaced bad caps and after some testing it turned out that the power supply board wasn't giving the supposed voltages.

This problem is not easily to be solved.Tries to changes all the capacitors components even if u think is good around the bad capacitors surrounding area.After that,if u still have the same problems.This problem could be any high voltage components parts like transformers to ICS power regulator.Trying to fix this power supply board probably beyond your ability and u must also have the tv power supply board original schematic and electron scope too . .To measure those power transformers and ics power regulator output.Tries websites like, to buy a whole new refurbish tv power supply board for the replacement that is ur best bet.

Sep 27, 2012 | Insignia NS-LTDVD19-09 LCD TV

1 Answer

The tv worked normally for a couple of hours and then clicked off, like in standby mode. when i switched it off completely and turned it on again it worked again but only for a short time. now only get...

Now tv turn on,pictures it flashes only a couple sec. than died have sound left only?Yes,than the tv power supply board,that the board where the tv power a/c cord plug into it.Board it might have dying and dead components parts that are called capacitors.Take the tv aparts.Inspect and check the tv power supply board carefully for dying and soon to be dead capacitors parts,these capacitors parts are alway bulges up or puffing up onto it tops.U have all the tools and know basic electronic also can do basic soldering work too?Yes,replaced all these dying capacitors parts are bulges or puffing up on to it tops capacitors parts with the same Micro Ferit and those capacitors voltages like 5 or 10 voltages higher the old capacitors components parts u replacing,now will solved this problems,also capacitors will last longer and have more heat resistance than before.If the tv power supply board check out and have none dying capacitors components parts that are dying and soon to be dead are bulging or puffing up on to it tops.Than the tv have those 2 long boards each of it sides that are called LCD inverter boards are dead,these 2 long LCD inverter boards only job are to provided the tv LCD screen panel a backlight to produced pictures.If u can't repair the power supply board by ur self,if the tv power supply require it.Tries websites like, to buy a whole refrubish power supply board or those 2 long LCD inverter boards for the replacement.

Jul 19, 2011 | JVC LT-42X579 42 in. LCD TV

1 Answer

I have the Samsung 46 in LCD TV LN46A650. I noticed the other day the left side of my screen was darker than the right side and there was also a pink hue to the left side. This only occurres when I turn...

If u unplug the tv power supply source and replug it back in the tv problems it go away?Yes.The power supply board is the source of the problems,it have dying capacitors parts.U have all the tools and understanding basic electronic also can do basic soldering?Yes,check carefully in the whole power supply board for dying capacitors parts,capacitors are dying are alway bulges or puffing up on to it tops.Replace all the dying capacitors with new capacitors with the same Micro Ferit and the capacitors voltages like 5 to 10 higher voltages more than the old capacitors for better heat resistances.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

Mar 30, 2011 | Samsung LN46A650 46 in. LCD HDTV

2 Answers

I have a phillips lcd hdtv. When I turn it on the light blinks 6 times. I'm sure its the power supply board, my question is how do i repair the power supply board without replacing it? I have a power...


Feb 17, 2011 | Philips 37PF9631D 37 in. LCD HDTV

1 Answer

My union color television is dead only power red light is on.

Swollen, Bulged, Bad Capacitor The main cause of this power up problem are bad capacitors on your power if the capacitor is bad
What you need for the opening of the television is Screw driver, Soldering iron(40watts+), Desoldering braid, Soldering wire, and capacitors.
Now lets talk about the specs, capacitors hold 3 important value:
1. The capacitance measured in uF(micro farads) (ex. 2200uF), 2. Voltage (ex. 10v), 3. Temperature (ex. 105°C)
Important Notes:
Flat panel Television power supply capacitors has 10v installed on the board and it is attached to a 12v bus which is causing to bulged.

Look at the bad capacitor and get the right information from it, remember uF, voltage and temperature. Mine, I only change 2 capacitors. It needed two 2200 uF, when I first saw my power supply it was really easy to spot the bad caps. Some Samsung LCD owners did went ahead replace all the capacitors on the power supply to make sure. Now if you’re like me, an inexperience solder, I would not recommend changing all the capacitors because to me it was time consuming for a noob(newbie) like me ^_^.

Few things to take note, always make sure you have the right polarity. Negative part is where the colored stripe on the capacitor.
But if otherwise, the power supply board is bad, you can try websites, to buy a refurbish power supply board for the replacement.
Hope this helpout...

Aug 08, 2010 | Televison & Video

1 Answer

My computer just died the morning. I removed the

red- +5v
yellow- +12v
orange - +3.3
black- 0v
blue- -12v
white - -5v
green - ps-on(+5v)
gray- power good(+5v)
purple- stand by (+5v)
disconnect smps from motherboard give the power to smps and short green and black wires and measure the above voltages

Mar 19, 2010 | Antec SmartPower 2 SP400 400-Watt Power...

4 Answers

I unplugged it and now it wont turn on after I plugged it back in to the wall outlet

The exact same thing happened to mine several days ago. I opened mine up, noted that two of the capacitors on the power supply are a bit puffed up, and tested the power supply's 12V and 5V outputs. The 12 Volt output is fine, but the 5 Volt output is only putting out 2 Volts. In short, all of the capacitors on the power supply are made by the same company (Jenpo) and apparently these capacitors were made using the stolen but incomplete formula for manufacturing capacitors much more cheaply. That "capacitor scandal" has cost electronics manufacturers millions. In any event, this would explain why Walmart blew out these Cyberhome CH-DVD 300 players for such a cheap price. Obviously all of the capacitors on the power supply will eventually fail. I have already experienced similar capacitor related problems with a few computer motherboards and other electronics equipment which I bought in the early to mid 2000's. I am contacting Cyberhome to see if they will send me a replacement power supply to go in my CH-DVD 300.

Jun 22, 2009 | Cyberhome CH-DVD 300 DVD Player

1 Answer

Power cord buzzes and MACPro does not recognize it

This is a fault in the power supply itself, I have just repaired one of these power supplies successfully.
The fault is caused by the failure of the filter capacitors on the 12V supply rail, and if the power supply is left connected to the mains supply (In our case 240V 50Hz) without the drive connected as a load, the unloaded output voltage will exceed the voltage rating of the capacitors, causing their failure. The failed capacitors had very obvious bulges at the top, and one was beginning to leak onto the PCB.

The filter capacitors on the 12V supply rail are rated at 16V, and the cpacitors on the 5V rail are rated at 10V, and when operated without a load, the 12V rail rises to approximately 19V, and the 5V rail rises to approximately 8V. All output filter capacitors are 1000uF, and 105deg C temperature rated.

I repaired my power supply by replacing all of the filter capacitors on the DC low voltage output rails with 1000uF 25V capacitors. Be careful to only fit the 105 deg C rated caps, as they operate at elevated temperatures in an enclosed environment with no ventillation to cool the power supply.
To ensure that the repair was reliable, I also replaced the filter capacitor on the 5V rail with the same 1000uF 25V, even though that capacitor showed no immediate signs of failure.

When reassembling the power supply, care must be taken to ensure that parts like the ferrite cored transformer are thermally bonded to the aluminium heatsink with a smear of heatsink compound.
When the power supply was first powered up following repair, everything was normal, the green power LED came on as usual, the supply outputs both came up OK, and the unit was not making any buzzing sounds, completely silent. The HDD now operated as normal when once again powered from this power supply.

This was the fix for my particular LaCie power supply model ACU057A-0512, and the supply once again works normally.

Brisbane Australia.

Mar 12, 2009 | LaCie 500GB d2 Quadra 500 GB USB 2.0 Hard...

1 Answer

Dishwasher does not stop filling and already replaced float switch...PLEASE HELP

Harry, the float and float switch are only safety devices to cut the power to the valve in the event the control board fails. The fill is controlled by the board. It sounds to me like it may be the valve itself. You can verify this by taking a meter and checking the voltage during the fill cycle. If the voltage drops out and it's still filling, it's your valve. If the voltage stays constant until the float switch kills it, it's your back.

Aug 31, 2006 | Kenmore 16602 / 16604 / 16609 Built-in...

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