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Laptop Mini eMachines eM250. when i start up the laptop the lcd stays white, very iluminated with no letters or nothing. just a bright light. i just replace the lcd for a new one, but it isnt the problem. the processor sound for a few seconds and then gets quiet. i connect an external lcd but nothing. i was thinking that maybe i can flash the bios with a USB or pendrive, but i need info about how to do it, so please if anyone has doing this, post the manual of procedure. thanks and sorry for my english, i am from dominican rep.

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6ya6ya
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chrlygrn
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have u checked the ram and made sure its functioning properly

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SOURCE: USB booting of external hard disk in HP laptop

You cannot boot Server 2003 from an external USB Hard Drive, it will have to be installed on an internal hard drive.

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cheap to fix
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SOURCE: Toshiba Laptop L35 S105 White screen

it could be video cable or whole lcd screen
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SOURCE: Acer Aspire 1800 not booting!

Hi there. Ok, firstly Flashing the BIOS is very risky, and should not be attempted unless absolutely necessary. There are 2 reasons for this. First, as it flashes the BIOS, it completely deletes everything from the BIOS chip, and then re-writes a fresh BIOS, if this operation is interrupted in anyway, i.e. system crashes, power loss/surge, then the BIOS chip is rendered useless. Secondly, you MUST have the correct BIOS code to get the correct BIOS Flash/Update. If you Flash the BIOS with the wrong BIOS Flash/Update, then it's the same as having no BIOS at all. No computer system can run without a BIOS. You can't even re-Flash the BIOS, as you would need it to recognise the components/hardware in the system.

What you have described, sounds like one of the above things I mentioned, has happened.

I'm sorry to say that there are only two solutions, neither are desireable.

1. If you're handy with a soldering iron, and are confident with electrical components, you may be able to get hold of another BIOS chip on the internet. You will need to take the old one off, and solder the new one on.

2. You will need to buy a new motherboard.

I'm sorry it's not what you wanted to hear.

Posted on Apr 13, 2009

LaptopExpert
  • 458 Answers

SOURCE: HP DV6000 Laptop won't power on

HOW TO FIX YOUR DV6000/DV9000/DV2000

All the Problems described in the previous posts are Graphics Related..
Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..

The symptoms of the Laptop Powering on and Shutting Off Repeatedly..Or.. Powering On and Having No Video...Or... Power Strip Lights Up, Beeps,Shuts Down...Or..No Power At All...Or.. Intermittant Loss Of Wireless/Video Goes In And Out/Touchpad Slows and Freezes..

To Fix this issue, You will need to Reflow The Graphics Chip.

I will Explain In Full Detail As To The Correct Method Below....

HP DV6000/DV2000/DV9000 Compaq v2000 Video Chip Reflow Instructions

First Step Is Complete Disassembly Of All Parts And Components..
Remove RAM, Remove CPU, Of Course Remove Heatsink and Fan assembly.

Next Step is Insulating the Motherboard... You need to Protect The CPU area, The RAM area, Cover any plastic Plug ports.

Try to leave 1/4 inch area around the edge of the chip free of insulation.

To Insulate the Board.. I use thick pieces of Tin/Aluminum, you can fold up some aluminum foil (tin foil) About 4 folds thickness....

Now that you have your Motherboard Insulated... Make Sure There's Nothing Flamable Or Burnable Below the Motherboard... it will get quite hot underneath.

You will need a Heat Gun.. You can get one of these at your Local Home Improvement Store, they cost about $15 - $30.. You Will Use ONLY the LOW Heat Setting... I REPEAT..... USE ONLY THE LOW HEAT SETTING ....

Next You Will Need Some Coins.. Yes Coins..
8 Quarters and 2 Nickels... Put the 2 Nickels On the Bottom and Stack Quarters On Top...
Place The Stack Of 2 Nickels And 8 Quarters On Top Of The Graphics Chip...

The Reason for using the Coins: Using the coins serves a few purposes...
1) It Helps Transfers the heat Into The Chip More Evenly/Slowly
2) It Helps Hold The Heat Longer/Then Helps To Cool Slower
3) It Gives The Correct Amount Of Weight That Is Needed To Press The Chip


A Thing To Look Out For...

Hewlett Packard is nutorious for using the RED epoxy around the edge of the Graphics chip.. this epoxy is used to help secure the chip to the motherboard...
This is a process that is Hand Done at the Factory.. And Some Boards Will Have Only A Little Amount of this, Some Will Have Alot of it...And Some are Only Done On The Corner Edges....

If There Is Alot of This On Your Chip, You Might End Up Needing To Carefully (REAL CAREFULLY) Remove as much of this epoxy as able to....You can use a Razor Blade To Lightly Scrape This Off... DO NOT MISS AND SCRATCH THE MOTHERBOARD!!! Go SLOW...

Now Comes The Heating Of The Chip...

Start With The Heat Gun About 6 Inches Away From The Top Of The Quarter Stack..You want to be holding the gun at a 45% angle.. Aim the heat at the Edge of the chip, You Will Start Rotating Around the Chip- around the outer edge of the chip...then use tighter circles concentrating on the quarter stack, then after about 30-40 seconds, slowly move closer to the chip...
Never Move the Heat Gun Closer than the Top Of Your Coin Stack...Then Pull It Back And Slowly Repeat.. The Chip Needs To Get Hot Enough To Re-Melt The Solder Balls On The Underside Of The Graphics Chip Back Down To The Contact Pads On the Motherboard.. and this takes Quite Alot of heating to Do.... You Must Not OVERHEAT the CHip... It Is Best To Underheat it and have to Redo.. than to overheat.. It will cause the solder to break down and even crack/split.. causing failure forever...
This process will take about 3 minutes total.. Once you shut off the Heat Gun.. Leave The Stack of Coins On The Chip And Let Sit For Another 5 minutes..

Now Remove The Coins(carefull they might still be hot)
Remove All Insulation.. Reinstall RAM, CPU, Heatsink and FAN Assembly (and Of Course Thermal Pads or Paste.. Note:. If Paste Is Used.. It Must Be Silver Paste...

Now You Can Connect The Power Button Strip/ Video Cable And The DC Jack Cable.... And Plug In AC adapter .. You're Now Ready To Test For Solid Power and Video.... user_offline.gif report.gif

Posted on Nov 22, 2009

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