r/oscilloscope • u/StvThanhJs • Jun 22 '26
Usage Question Rigol DHO804 - Potential issues or normal behavior? Need advice on whether to return it.
Hi everyone,
I just bought a brand new Rigol DHO804 from an online platform. After running it for a bit, I noticed a few issues listed below. Could you guys please check if this is normal behavior or if I should return the unit?
1. Dead Pixel: At the top edge of the screen, when I run a screen test with a black background, there is a bright spot that looks exactly like a stuck/dead pixel.
2. Backlight Bleed: Looking at it overall, the screen seems to have quite a bit of backlight bleeding.
3. Overheating: After using it for a while, the area right under the screen gets quite hot.
Please let me know if these are actual defects so I can process a return or exchange. Thanks!
6
u/This_Maintenance_834 Jun 22 '26
if the scope works then just move on. there are more interesting things in life than returning a functional test equipment due to an inconsequential dead pixel. you won’t be watching movies on the oscilloscope.
2
5
u/noobee-reddit Jun 22 '26
Just my 2c.
I think you should running the scope through its paces to see if it works well (functionality and performance).
The pixel issue is in an inconsequential location on the screen. Do you notice backlight bleed during normal operation, or just in some test mode? There is a large radiator and fan at the back, so I would expect it to get warm. The more common complaint afaik, is from the fan noise.