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 1 869 027 12 power supply board $60.00 Time Remaining: 4d 20h 2m Buy It Now for only: $77.00 |
 Toshiba 32BV500B Power Supply Board $59.51 Time Remaining: 28d 6h 35m Buy It Now for only: $59.51 |
 Dell Plasma W5001C Power Supply Board Repair PSPF651B0A $105.00 Time Remaining: 16d 18h 30m Buy It Now for only: $105.00 |
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NEW Laptop/Notebook AC Adapter Power Supply Cord for Dell Inspiron 1420 1501 1520 1521 1525 6000 6400 300M 500M 505M 600M 640M 700M 710M E1405 E1505 Sale Price: $0.01  |
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Compatible Part Numbers: 9T215, NADP-90KB, PA-12,00001, 310-2860, 310-3149, 310-4408, 310-7251, 310-7696, 310-7697, 310-7866, 310-8363, 310-8941, 310-9048, 310-9050, 310-9249, 310-9438, 310-9439, 5U092, DF263, F7970, HF991, MK911, N2765, N2768, NF642, pa12, Pa-12, PA-1650-050,PC531, XD733, XD802, YR733,0F7970 Fit Laptop Models: Inspiron: 300M, 500M, 505M, 600M, 640m, 700M, 710M, 1401, 1410,1420, 1501, 1520, 1521,1525, 6000, 6400, E1405, E1505, Latitude: 131L, D400, D410, D420, D430, D500, D505, D510, D520, D530, D531, D531N, D600, D610, D620, D630, D630N, D631N, D800, D810, D830, D830N, X300, E4300 Precision: M20 XPS:M1210, M1330, M140... |
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Coolmax LCD Power Supply Tester PS-228 List Price: $30.99 Sale Price: $11.67 |
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Coolmax Technology, Inc PS-228 Device Tester 14912 885 |
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NEEWER® 20 Pin Computer Power Supply to 24 Pin Mother Board ATX Adapter Cable Sale Price: $2.55 |
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CablesToBuy™ 6 Inch P4 12V 4 Pin ATX Power Supply Connector Cable Adapter List Price: $4.69 Sale Price: $1.70 |
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Allow your ATX power supply to support P4 motherboard power connectorConvert regular 4-pin molex power connector to 4-pin motherboard power connectorA must for any motherboard upgradeUseful for Pentium 3 aboveHeavy gauge stranded cable fully tested Voltage:12V |
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StarTech.com 350 Watt ATX 12V 2.01 Dell Replacement Computer PC Power Supply ATX PW350DELL List Price: $60.99 Sale Price: $43.57 Used From: $29.95 |
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This 350 Watt ATX12V 2.01 Dell PC Power Supply is a reliable upgrade or replacement for many compatible Dell computers (see compatible models below). It offers dual 12V power rails to deliver stable power to demanding components, as well as both 20 and 24-pin ATX motherboard power connectors and a generous number of component connectors to ensure broad system compatibility... |
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Casio AD-5 Keyboard AC Power Adapter List Price: $14.95 Sale Price: $11.64 Used From: $15.14 |
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If you own a Casio keyboard, extend your battery life by using this optional AC adapter. Plug in while you're at home or near an electrical outlet rather than wasting batteries. For use with all LK models, all CTK models (except the CTK-5000), the WK-110 and the WK-200... |
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Power Supply Cord for DELL XPS M1330/M1530/M1210 Laptop Sale Price: $2.94 |
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Replace Part Number: PA-10, NADP-90KB, PA-1900-02D, PA-1900-02D2, U7809, C2894, 9T215,310-2862, 7W104, 310-399, 09T215, 5U092,PA-1900-04 Fit laptop and notebook pc models: Dell Inspiron 1501, Dell Inspiron 300m, Dell Inspiron 500m, Dell Inspiron 510m, Dell Inspiron 600m, Dell Inspiron 630m, Dell Inspiron 640m, Dell Inspiron 700m, Dell Inspiron 710m, Dell Inspiron 6000, Dell Inspiron 6400, Dell Inspiron 8500, Dell Inspiron 8600, Dell Inspiron 9200, Dell Inspiron 9300, Dell Inspiron 9400, Dell Inspiron E1405, Dell Inspiron E1505, Dell Inspiron E1705, Dell Latitude D400, Dell Latitude D410, Dell Latitude D500, Dell Latitude D510, Dell Latitude D505, Dell Latitude D520, Dell Latitude D600, Dell Latitude D610, Dell Latitude D620, Dell Latitude D800, Dell Latitude D810, Dell Latitude D820, Dell Latitude X300, Dell Precision Workstation M60, Dell Precision Workstation M65, Dell Precision Workstation M70, Dell XPS M2010, Dell XPS M140 Dell Inspiron: 1150, 8500, 8600, 9200, 9300, 9400(E1705) Dell Latitude: X300, D400, D420, D410, D500, D505, D510, D600, D610,D620, D800, D810, D820, XPS M140 Dell Inspiron: 300m, 500m, 505m, 510m 600m, 630m, 640m, 700m, 700m, 1150, 6000, 6400 (E1505), 8500, 8600, 9200, 9300, 9400 (E1705) D-Series Docking Stations or D/Port Replicator |
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Picopsu-90 12v Dc-dc ATX Power Supply Cyncronix Rating List Price: $39.95 Sale Price: $27.50 |
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World's tiniest 12V DC-DC ATX power supply unit (even smaller than picoPSU-120) Ultra-Compact design, less cables. Smallest plug-in 12V ATX dc-dc power supply. Compatible with all mini-itx motherboards AND regular boards... |
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Dynex DX-400WPS 400 Watt ATX PCIe SATA PC Power Supply List Price: $49.99 Sale Price: $14.95 Used From: $9.99 |
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DX-400WPS 400 Watt ATX PCIe SATA P C Power Supply |
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Plugable USB 2.0 10 Port Hub (with Power Adapter) List Price: $34.99 Sale Price: $25.99 Used From: $23.38 |
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Featuring a simple yet flexible design, the Plugable 10 Port USB 2.0 Hub provides easy expansion for any USB capable system. All upstream and downstream ports are on the front and back sides of the hub, minimizing desktop cable clutter... |
Power Supply Board
Repair LCD Power Supply The Easy Way
Troubleshooting LCD monitor power supply pack is easier than the crt monitor power supply. It is small and compact and usually has only one output which is 12 volt and range from 2 ampere to over 4 ampere. Some designed have 18 and 24 volts also. Nowadays most LCD power supplies are build into the main board such as the Dell E151FP LCD Monitor while the older type were separated as power pack module.
The power pack module type is easy to diagnose because you can replace another working unit just to make sure is the power pack that giving problem. You may also use an external dc power supply to power up the LCD to confirm if the power pack is faulty. If you do not have the external dc power supply, you can always use this method to isolate the problem especially the symptoms are no power, low power and power blink. Using the rear light bulb (12 volt) from a car and connect it to the power pack output jack. If it light brightly then the power pack is okay. If it blink or dim the power pack have problem. Why have to use this method to test it? Because, if there are components shorted or leaky at the LCD main board, it will affect the power supply performance.
From experienced, most of the LCD power supply problems whether in the power pack or built into main board were due to the failure of electrolytic capacitors (most probably due to heat) in the primary and secondary section. Most of the capacitors have a high ESR which causes the power supply to produce low output, blink or no power at all. Typical value electrolytic capacitors in the primary side are 47 and 100 micro farad 50 Volt and the secondary sides are 1000 to 2200 micro farad 25 volt. Sometimes you can see the capacitor top casing became bulge and the sleeve that covered the capacitor casing turned into darker color like brownish.
The power section in some of the LCD screen are still using the UC3842 pulse width modulation (pwm) ic. This type of ic is quite easy to find in the market compare to some power ic which is very difficult to get. Samsung 153V LCD monitor is using the TOP247F power ic which is quite easy to troubleshoot if power fail in this model. Some power pack that came in only have minor burnt and after cleaning it and replaced the fuse, it will work as good as the new one.
Troubleshooting LCD power supply is not that difficult provided if you know how a power supply work. If you are unsure of how to troubleshoot power supply, I urge you to read all my power supply articles at the power supply page. I will continue to post more power supplies articles at that page and hope you could drop by more often to check out my website.
About the Author
Find out more at the links below. You will be very surprised to discover that LCD and Electronic Component Repairs can make thousands of dollars even for a novice. You can find out the repairing secrets.
Find out How to Repair Any LCD Monitor - It is a breeze!
Learn about Secrets of Electronic Repairs.