How To Use Dc Power Supply For Dell Laptops

 All you have to need is DS2501 (EPROM) ic.This ic has three legs, two of them are in use and the third one is spare. First leg of the ic is called ground, second is known as data and the third leg is spare which is not connected to anything; as I had shown you in this picture. I use the wire that is mentioned in the first picture for my dc power supply in laptop checking. You can convert the chargers of Toshiba, Acer or Asus into Dell by making this cable that is connected to ic. And you can also use this ic in repairing of the Dell charger. When you will check the bios of Dell laptop , there will be mention that 90 watt charger is connected. Each laptop has different range of wattage. For example, Dell alienware laptop is of 220 watt and mostly laptops which are coming now a days are of 90 watt. The ic DS2501 which we are giving is of 90 watt.

Dell Inspiron 15 (3521) Beep Codes

How to identify beep codes:

• Listen to the number of consecutive beep when the computer begins to boot. Restarting the laptop may be necessary and should not harm the laptop at this time.

Dell Inspiron 15 (3521) Beep Codes
# of Beeps	Description	Possible Cause(s)
1	BIOS ROM checksum in progress or failure	System board failure, covers BIOS corruption or ROM errors.
2	No Memory (RAM) detected	Memory or Memory slot failure
3	chipset Error (North and South bridge error, DMA/IMR/Timer error) Time-Of-Day Clock test failure Gate A20 failure Super I/O chip failure Keyboard controller test failure	System board failure
4	Memory read / write failure	Memory failure
5	Real Time Clock (RTC) power fail	CMOS battery failure
6	Video BIOS test failure	Video subsystem failure
7	CPU Cache test failure	Processor failure
8	LCD	LCD failure

Most Common Fixes:

• 1 Beep: Replace the motherboard / system board.
• 2 Beeps: Reseat the memory or replace the memory.
• 3 Beeps: Replace the motherboard / system board.
• 4 Beeps: Reseat the memory or replace the memory.
• 5 Beeps: Replace the CMOS battery.
• 6 Beeps: Reseat or replace the video card or replace the motherboard / system board.
• 7 Beeps: Reseat or replace the CPU.
• 8 Beeps: Reseat the LCD cable or replace the LCD screen.

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