I Have an hp ze4300 laptop. it will not boot up?

Per the internet site, it depends upon the model of laptop. Here are some examples:

Laptops - Access Bios Settings Key

Issue


The most common Access Bios key is the "DEL" button or "F2". This depends on the laptop model, however, and can be confusing if you do not know which key to press.


Solution


Here is a list of laptop models and brands with the keyboard commands / key for accessing the BIOS Setup:



Acer: F1, F2, CTRL+ALT+ESC

ARI: CTRL+ALT+ESC, CTRL+ALT+DEL

AST: CTRL+ALT+ESC, CTRL+ALT+DEL

Compaq 8700: F10

CompUSA: DEL

Cybermax: ESC



Dell Laptops:

Dell 400: F3, F1

Dell 4400: F12

Dell Dimension: F2 or DEL

Dell Inspiron: F2

Dell Latitude: Fn+F1 (while booted)

Dell Latitude: F2 (on boot)

Dell Optiplex: DEL

Dell Optiplex: F2

Dell Precision: F2



eMachine: F2

Gateway 2000 1440: F1

Gateway 2000 Solo: F2

HP (Hewlett-Packard): F1, F2 (Laptop, ESC)

IBM: F1

E-pro Laptop: F2

IBM PS/2: CTRL+ALT+INS after CTRL+ALT+DEL

IBM Thinkpad (newer) Windows: Programs-Thinkpad CFG.



Micron: F1, F2, or DEL

Packard Bell: F1, F2, Del

Seanix: DEL

Sony VAIO: F2

Sony VAIO: F3

Tiger: DEL



Toshiba 335 CDS: ESC

Toshiba Protege: ESC

Toshiba Satellite 205 CDS: F1

Toshiba Tecra: ESC then F1 or F2



Toshiba Notebook [Newer models]:

• Turn on the computer by holding down the power button while pressing the ESC key
  
  
  
  
  
  • The machine will beep, then display:
  
  
  
  • 
    
    Check System, then press [F1] key.
    
    
  
  
  
  



• Release the ESC key



• Press the F1 key

Laptops Access Bios Settings Key

Boot Priority on Dell Latitude 100L

1. Turn On Your PC
   Have you ever noticed the messages that pop up on the screen as soon as you turn on your PC? These messages tell you a key combination you can press to enter "Setup" or the "BIOS." Watch your screen and see if you can read what keys to press.
   
2. Press the Keys to Enter Setup Mode
   If you did not see a message telling you what keys to press, try tapping the following possibilities as you turn on the machine:
   
   • Esc
     
   • F2
     
   • F12
     
   • F10
     
   • F1
     
   After pressing Esc or other key, you will most likely see instructions telling you how to enter "Setup Mode". Follow those instructions.
   On some computers, you must hold down the key before you press the power button to turn on the computer. For example, if you are converting a Toshiba laptop to a Linux Workstation, you must hold down the Esc key and then press the power button. The computer then asks you to press F1, and you can then set the "Boot Priority."
   
3. Using the Arrow Keys, Choose the "Boot," "Boot Order," or "Boot Priority" Option
   The menu of choices you see will be different for different kinds of computers. Remember that the choice you want is the "Boot" order or "Boot Priority." On some computers, this is called the "Start Up Options" or "Start Up Sequences." You are going to change where the PC will look for boot information when it starts up. (CD-ROM, HARD DRIVE/HDD, LAN, FLOPPY, USB). If you wish to boot from your Hard drive, then select it as your First Priority.
   
4. Using the instructions on the screen, save your settings and start up your PC. The PC must boot from the HDD. Regrds
   

there is an instruction which say "if you wish to boot from cd press any key", look out for it

You should have the option to press either f2 or f12 to go in to bios

press hard disk and boot the windows

u must have to detect your hard disk.
check u detect your hdisk in bios settings.
then also try to boot option and select hdd .

To Access the Bios Setup Utility Here Is A List Of Key Commands And The Make/Model They Are For..

Acer - Aspire, Power, Veriton, Extensa, Ferrari, TravelMate, Altos

• Press Del or F2 immediately after powering on.
• The BIOS on the Acer Altos 600 server uses the Ctrl+Alt+Esc key and the F1 key for advanced options.
• Older Acer computers may use also use the F1 or Ctrl+Alt+Esc keys to access BIOS.

Compaq - Presario, Prolinea, Deskpro, Systempro, Portable

• Press F10 while the cursor in the top right corner of the screen is blinking.
• Older Compaq computers may use the F1, F2, F10, or Del key to give access to BIOS.

Dell - XPS, Dimension, Inspiron, Latitude. OptiPlex, Precision, Vostro

• Press F2 when the Dell logo appears. Press every few seconds until the message Entering Setup appears.
• Older Dell desktops and laptops may instead use Ctrl+Alt+Enter or Del to enter BIOS.
• Older Dell laptops may use Fn+Esc or Fn+F1.

eMachines - eMonster, eTower, eOne, S-Series, T-Series

• Press Tab or Del while the eMachine logo displays on screen.
• Other eMachine computers may use F2 to enter BIOS.

Fujitsu - LifeBook, Esprimo, Amilo, Tablet, DeskPower

• Press F2 once the Fujitsu logo appears.

Gateway - DX, FX, One, GM, GT, GX, Profile, Astro

• Press the F1 key repeatedly after restarting the computer.
• Some older Gateway computers use F2 to access the BIOS Setup utility.

Hewlett-Packard (HP) - Pavilion, TouchSmart, Vectra, OmniBook, Tablet

• Press the F1 key after restarting the computer.
• HP Tablet PCs may use F10 or F12.
• Other HP computers may allow access to BIOS using the F2 or Esc keys.

IBM - PC, XT, AT

• Press F1 immediately after powering on the computer.
• Older IBM computers (including some laptops) may utilize the F2 key for BIOS entry.

Lenovo (formerly IBM) - ThinkPad, IdeaPad, 3000 Series, ThinkCentre, ThinkStation

• Press F1 or F2 after powering on the computer.
• Older Lenovo products allow access to BIOS using Ctrl+Alt+F3, Ctrl+Alt+Ins, or Fn+F1.

Micron (MPC Computers) - ClientPro, TransPort

• Press F1, F2 or Del immediately after powering on the PC.

NEC - PowerMate, Versa, W-Series

• Press F2 to enter the BIOS Setup.

Packard Bell - 8900 Series, 9000 Series, Pulsar, Platinum, EasyNote, imedia, iextreme

• Press F1, F2, or Del to enter BIOS.

Sharp - Notebook Laptops, Actius UltraLite

• Press F2 after the computer starts.
• Some very old Sharp PCs require a Setup Diagnostics Disk to access BIOS.

Shuttle - Glamor G-Series, D'vo, Prima P2-Series, Workstation, X Mini XPC, Surveillance

• Press F2 or Del on startup.

Sony - VAIO, PCG-Series, VGN-Series

• Press F1, F2 or F3 after turning on the computer.

Toshiba - Portégé, Satellite, Tecra

• Press F1 or Esc after powering on to access BIOS.

The following companies are either closed for business or no longer manufacture or support mainstream computers systems so verifying the following BIOS access information is nearly impossible. I have included what I could dig up for anyone who might be interested:
ARI / ALR / AST (Advantage) - Press the Ctrl+Alt+Esc or Ctrl+Alt+Del keys.
Cybermax - Press the Esc key.
Tandon - Press the Ctrl+Shift+Esc keys.


Good Luck and Hope it helps...
http://www.wnycomputerpro.com

In these cases, I'd strongly recommend checking the RAM to ensure that isn't the problem. If the RAM is fine, then the issue is likely with the laptops motherboard. In which case, it would need to be sent back to the manufacterer.

just press delete button to access bios settings not F2 and escape button.

Try each of the following: F1 F2 ESC DEL F10