Question about Dell Latitude D400 Notebook

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D400 laptop not power on,external power supply ok,19.5v ok on board,F1(fuse)ok

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If you've tried a known good AC adapter, then you will be replacing the motherboard.

Posted on Sep 30, 2009

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Diagram where fuse is in the polaroid flm-3701


There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light. Any capacitor that is swollen is bad.
diagram-fuse-in-polaroid-flm-3701-1onojclnad5aenzciu2mb45v-1-0.jpg

May 12, 2014 | Polaroid FLM-3701 Television

2 Answers

Fuses or not


There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V.
How ever, capacitors are more likely to fail on this television. The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light. Look for swelling in the tall capacitors E8 thru E17 on the left side of the board. Also E6, E7 and E22 can go bad, but they do not swell.
fuses-or-not-1onojclnad5aenzciu2mb45v-1-0.jpg

Mar 02, 2014 | Polaroid FLM-3701 Television

1 Answer

My laptop screen is bright. Brightness control works but no picture. The picture is ok on external monitor. Sometimes a faint and incomplete picture appears on startup but disappears after a few seconds....


This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Aug 25, 2010 | Compaq Presario 700 470024-192 Notebook

3 Answers

I have a gv47l fhdtv10a lcd. it made a loud pop and went blank. i replaced the fuse on the power board. the tv will power on but the screen stays black and the tv will not power off unless you unplug it....


Something on the power supply board has failed. One or several of the voltages is bad and you don't have full control, no off, no screen voltage, etc. Unless you can troubleshoot switching power supplies, its best left to a repair shop.

May 04, 2010 | Vizio GV47LF Television

1 Answer

Can i use any external cd/dvd on dell latitude d400?


Any external CD/DVD drive that connects to USB should work.

Feb 07, 2010 | Dell Latitude D400 Notebook

2 Answers

Partially blank screen on top of my DELL latitude d400


reinstall it clean ...I mean from scratch..if is a virus or a OS error it wil fix the issue ...it also may be a screen setting ...Im not sure if it has such a feature on your laptop ..but it worth to try ...look for something like the settings from the clasic monitors...also look into the control panel maybe has some settings for the display there ....by the way you described..it doesn't sounds like a lcd malfunction ..cause those slightly ever get this regulate ...and often on small areas...and not rectangular or in lines( band) ...also check the resolution ...even one by one ...to see if another will fit better ...Good luck !

Sep 10, 2009 | Dell Latitude D400 Notebook

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