HP pavilion f2304 Manuale Utente

Mercury is sometimes found in batteries, relays and switches. It 
damages the nervous system and is toxic in high doses. The 
relevant TCO ‘99 requirement states that batteries may not contain 
any mercury. It also demands that mercury is not present in any of 
the electrical or electronics components associated with the 
labeled unit. There is however one exception. Mercury is, for the 
time being, permitted in the back light system of flat panel monitors 
as there today is no commercially available alternative. TCO aims 
on removing this exception when a mercury free alternative is 
available.

CFCs (freons):
The relevant TCO ‘99 requirement states that neither CFCs nor 
HCFCs may be used during the manufacture and assembly of the 
product. CFCs (freons) are sometimes used for washing printed 
circuit boards. CFCs break down ozone and thereby damage the 
ozone layer in the stratosphere, causing increased reception on 
earth of ultraviolet light with e.g. increased risks of skin cancer 
(malignant melanoma) as a consequence.

Lead can be found in picture tubes, display screens, solders and 
capacitors. Lead damages the nervous system and in higher doses, 
causes lead poisoning. The relevant TCO ‘99 requirement permits 
the inclusion of lead since no replacement has yet been 
developed.