Công Nghệ

Dell Boot Sequence Problem Solution


I got several Dell Dimension E521s from a office that was closing down, they didn’t come with any hard drives. So, I didn’t know if they would work or not. After a week, I got 2 used hard drives from a computer store that deal in used computer equipment and computers for about $10 for a 250 gb hdd, and $5 for a 160 gb hdd. I installed them onto both computers, and one of the computers had a problem booting. I put the operating system in the DVD drive, and it didn’t work. I proceeded to the BIOs to change the boot sequence. I put the CD/DVD-ROM drive first, and the hard drive next. However, the only drive that was numbered was the USB device.

The next thing I did was save the information I changed on the BIOs and exited the BIOs. The operating system was in the drive, and it did not work again. I never encountered anything like this before, I was perplexed. I came with another idea. I went to the BIOs and I went to the BIOs sequence menu again. Then, pressed the spacebar to number the sequence, and it worked.
Correct Boot Sequence

2. Hard Drive

Incorrect Boot Sequence

Hard Drive
1. usb boot drive

I guess, you learn something new everyday. Buying old computers for cheap and upgrading to the limit are one of my hobbies. I have some experience with this model. I was able to upgrade the Dell Dimension E-521 to a very modern system which I use at my office today. The specs are as follows.

CPU: Athlon 64 x 2 5600+ 2.9 ghzs
GPU: PNY Geforce GT 740 1 gb DDR5
RAM: 8 gbs DDR2 PC-5300 667 mhzs
Hard Drive: Western Digital 1 TB sata 3
DVD-ROM: Samsung SSH-224 sata 3
Operating System: Windows 7 Ultimate 64 bits

The system works well. I can play mp3s on it while I am at work. I can watch or listen to Youtube videos while I am using other work applications. It can handle everything I throw at it. For me it is different, I am a independent contractor, so I have to provide myself with my own equipment. I had a Intel I7 4790 at my office, and I used the modernized Dell Dimension E-521 instead. I got the computer for free, but I had to upgrade it.


♠ If you found this video helpful, you could make a donation if you want here.


♦ Dell No boot device available problem fix

♦ Dell E521 Boot Hang

♦ Videos of upgraded Dell Dimension E-521

♦ Benchmarks

♦ Fan and Heatsink Removal

♦ Bent CPU pin fix


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  1. I just had this issue on machines I was decommissioning at work and here is the fix I found:
    go into bios and change drive mode from AHCI to ATA.
    after that no problem booting from CD

  2. my hero

  3. thenks broo its worked

  4. Thank you!!!!IT WORKS GUYS TRY IT!!!!!

  5. My computer is slowly turn on how to solve this

  6. mines says insert system disk

  7. Not working 🙁

  8. Still not working 🤦‍♂️

  9. Dias com o problema, até esse vídeo cair do céu!!!

  10. not work for me dear

  11. Merci

  12. https://share.influencerse arn.com/dashboard/register.php?referral=ivantec

  13. Me ajudou valeu

  14. Thanks a lot
    With help of this vidio i solve my pc problem😊

  15. me sirvio, gracias amigo

  16. Hello friend, could you help me, I have a 490 but I can't get the second processor to recognize the bios, will you know how to enable it?

  17. Sir i have donr this work… But it just open one time… When i am yrying to open it again after shutting down again same problem is occuring…

  18. Ajudou bastante mano

  19. Thanks, but now i can not use the wifi by cable, Did it do something ? 🙁

  20. Thabk you 🖒

  21. Thank you ! I fixed my compute with your information. Thank you very much!

  22. Thank you so much!!

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