Dell E173FPb 17″LCD Repair
If you have a Dell E173FPb, E172FPb or E171FPb monitor that either has a blinking power light or a very dark picture then this should help get you back running. Below you will find a full walk thru on repairing your LCD monitor. To do the repair you will need the following tools: Soldering iron, de-solder braid, Phillips screwdriver, small flat blade screwdriver. You will also need the following electronic parts: qty(4) C5707 transistors, qty(2) FU9024N transistors and Qty(1) 3amp fuse. We sell a repair kit with all of the parts for $12.00 This is not guaranteed to solve all problems but in most cases this is the issue with this model.
If you don’t want to do the repair yourself, just use the service request link above. Most monitor repairs run $30-35 plus return shipping.
First you need to remove the power cable, signal cable and the stand. To remove the stand remove the 4 screws as shown in the picture to the right. After the stand is off the signal cable can just be unscrewed.
After the stand is removed you will need to pry the back of the case off as illustrated in the pictures below. Use a small flat bladed screwdriver start at one of the release openings on the bottom as shown.
After the screen unit is removed from the plastic case we can get down to the repair. We need to remove the power supply unit. You will need to unplug the 4 backlight connections (connectors with pink and white leads, circled in red) and the control panel cable the flat signal cable. Then remove the 2 screws from each end, then undo the 2 small nuts holding the vga connector to the case (circled in yellow)
Before you fully remove the shield and board assembly be sure to unplug the LCD signal cable that is under the boards as seen in the picture to the right.
Now turn the assembly over and remove the 5 screws and the 2 plastic standoff clips as marked by the yellow circles below.
Now with the board removed you will need to replaced the components that are circled. The parts are as follows:
PF 3 Amp Fuse (yellow)
Q759, Q760, Q734 & Q740 – C5707 transistors (red)
Q743 & Q751 – MOSFET Transistors (blue)
The location number are for a E173FPb but the E172FPb boards have the components in the same locations. While you have the board out you will also need to resolder all of the connections on all four transformers that are around the transistors. Small hairline cracks in the solder joints are what causes the transistors to blow out.
After the parts are replaced just reverse the procedure to reassemble the case. Now apply power and you should have a fully functional monitor again.