Internal doesn't work, external does

Hi all,
Thanks for letting me post, taking the time to read, and for any help you can provide.

The GWA1464B (E113) ATA DVD-RW in my Dell XPS 600 is not burning DVDs or reading movie DVDs. I uninstalled all DVD burning associated softwsre (including virtual drive software and CloneDVD types), rebooted, uninstalled the drive in the device manager, rebooted, removed the filters in the associated filters in the registry (as suggested when your drive does not appear in the device manager), and reinstalled a new downloaded version of ImgBurn- still cannot burn or read movie DVDs.

I brought home a Sony External DVD burner, and ImgBurn worked perfeectly.

I ran Nero CD/DVD Speed and received the following error message:
Error!
NO ADDITIONAL SENSE INFORMATION (000000)

Below is the info from the window in ImgBurn:
HL-DT-ST DVD±RW GWA4164B E113 (ATA)
Current Profile: DVD-R
Disc Information:
Status: Empty
Erasable: No
Free Sectors: 2,297,904
Free Space: 4,706,107,392 bytes
Free Time: 510:40:54 (MM:SS:FF)
Supported Write Speeds: 4x, 8x, 12x, 16x
Pre-recorded Information:
Manufacturer ID: CMC MAG. AM3
Recording Management Area Information:
HL-DT-ST DVD±RW GWA4164B
Physical Format Information (Last Recorded):
Disc ID: 0@P-!-00
Book Type: DVD-R
Part Version: 5
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,495,103
Last Physical Sector in Layer 0: 0
Below is the log from ImgBurn:
I 21:48:31 ImgBurn Version 2.3.2.0 started!
I 21:48:31 Microsoft Windows Vista Business Edition (6.0, Build 6000)
I 21:48:31 Total Physical Memory: 2,094,000 KB - Available: 1,425,648 KB
I 21:48:31 Initialising SPTI…
I 21:48:31 Searching for SCSI / ATAPI devices…
I 21:48:31 Found 1 CD-RW, 1 DVD-ROM and 1 DVD±RW!
I 21:48:54 Operation Started!
I 21:48:54 Source File: C:\Users\Rob\Downloads\VS2008MSDNLibraryENUX1429217.iso
I 21:48:54 Source File Sectors: 1,047,902 (MODE1/2048)
I 21:48:54 Source File Size: 2,146,103,296 bytes
I 21:48:54 Source File Volume Identifier: DVD1
I 21:48:54 Source File Application Identifier: CDIMAGE 2.54 (01/01/2005 TM)
I 21:48:54 Source File Implementation Identifier: Microsoft CDIMAGE UDF
I 21:48:54 Source File File System(s): ISO9660, UDF (1.02)
I 21:48:54 Destination Device: [1:1:0] HL-DT-ST DVD±RW GWA4164B E113 (G:) (ATA)
I 21:48:54 Destination Media Type: DVD-R (Disc ID: CMC MAG. AM3) (Speeds: 4x, 8x, 12x, 16x)
I 21:48:54 Destination Media Sectors: 2,297,904
I 21:48:54 Write Mode: DVD
I 21:48:54 Write Type: DAO
I 21:48:54 Write Speed: MAX
I 21:48:54 Link Size: Auto
I 21:48:54 Test Mode: No
I 21:48:54 BURN-Proof: Enabled
I 21:48:54 Filling Buffer… (40 MB)
I 21:48:55 Writing LeadIn…
W 22:45:32 Failed to Write Sectors 0 - 31 - Unknown (Write Error) (0x0C, 0x80)
W 22:45:32 Retrying (1 of 20)…
W 22:45:32 Retry Failed - No Seek Complete
W 22:45:32 Retrying (2 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (3 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (4 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (5 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (6 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (7 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (8 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (9 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (10 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (11 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (12 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (13 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (14 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (15 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (16 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (17 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (18 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (19 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
W 22:45:32 Retrying (20 of 20)…
W 22:45:32 Retry Failed - Invalid Address For Write
E 22:45:35 Failed to Write Sectors 0 - 31 - Unknown (Write Error) (0x0C, 0x80)
I 22:45:35 Synchronising Cache…
E 22:45:36 Failed to Write Image!
E 22:45:36 Operation Failed! - Duration: 00:56:41
I 22:45:36 Average Write Rate: N/A - Maximum Write Rate: N/A
I 22:45:37 Close Request Acknowledged
I 22:45:37 Closing Down…
I 22:45:37 Shutting down SPTI…
I 22:45:37 ImgBurn closed!

LG burner, could be a power problem …PSU.
What PSU is it, what specs.

Also try with better media, Verbatim!